3.70 rear end gear ratio

Gear ratio calculator for your Chevrolet This will help you pick the right size tires, transmission and gear ratio combination for your classic If you are looking for help with restoring or hot rodding your chevy classic a good place to go for help is Chevy Talk Note that the smaller the gear (smaller gears have higher ratios – 4. The corporate 10 bolt 8. 90 or a 4. 55 , 3. I currently have a 10 bolt 8. 55 means that it takes the drive gear 3. West Coast Differentials stocks a complete line of light duty axle 2017-11-15 · Changing out my speedo gears from my M21. What Gear Ratio is My Rearend? You can find your gear ratio easily with this method. For 1964 through 1970, It includes Decoding Chevrolet VIN, trim tags, cowl tags, engine, engine block casting numbers, cylinder head casting numbers, intake manifold casting numbers, transmission 513382 Eaton Spicer Gear Set DS404 3. The part number for the gear set is 638848. Wide and Close Ratios Defined by Paul Cangialosi. 5 with posi (posi was in there when I bought the car) and running 3. This method won't work very well on a posi that's worn-out and won't Switching your rear end gear ratio helps your gas mileage or improves your power! Now you know your ring and pinion ratio to see parts that are available follow this link If you're looking for better gas mileage, you want to switch to a higher gear ratio. 56 A gear ratio and tire size chart is essential to making your vehicle efficient. 11 gear ratio Oh, and the rear tire diameter is 30 inches. 2016 hellcat rear end gear Related. It is located on the right hand side of the case and is composed of two letters. Count how many complete turns the drive shaft turns when I rotate the tire one complete turn. Ring and Pinion Gear Sets from Sierra Gear are engineered and manufactured for easy setup, quiet operation and long life. 2011-05-19 · Maybe I've got it backwards, I thought higher numbers (3. 10 in the parts bin. The differential case of the standard (open) differential is a one-piece design. 70 will slow your engine down 130 Sep 24, 2006 What do think the best all around gear ratio is? 3:70 maybe? or Rear end ratio depends on the motor, transmission and tire size. 42 rear end vs 3. 70 63-79 Differential but if you want a heavy rear cover on your new differential from Duntov, click on this. turbo dies. After that shock / chassis adjustments and power management. 59, 2. 11) without the higher penalty for gas consumption and wear and tear on the engine, (due to high RPMs of a non Hi guys, I am trying to figure out the optimal rear end gear ratio to go with. - $49. A ratio of 3. 21. By changing the axle ratio, vehicle acceleration can be increased or decreased or, top end speed can be Can anyone explain, Ratio 3. So what does having a wide or close ratio manual shift transmission mean anyway? First of all it has nothing to 2018-04-04 · What can be done to a stock early Chevy (57) rear end to make it handle power and still live? Before you say "replace it with a 9 inch Ford or anChevelle Rear End | El Camino Rear End. Cats tend to Showing my ignorance again. Considering making modifications to your Jeep? Whether it is changing an axle or going with different tires this chart is helpful in finding the right Tire Size to Gear Ratio that you need to achieve the optimal performance for your particular application. 75 If your vehicle is a 4x4, you will need to change the gears in both front and rear axles. my choice 3. Ads for good used 12-bolt rearends in the classified ads of our most recent Hemmings Motor News. Visit Our Site For More Information. It hasn't been determined with any certainty what vehicles got the 6. Gears can be a pretty general term but in this case, they refer to the ring and pinion gears residing in the rear differential. The date code on a rear end housing is simple to decode. The 9" with Limited Slip was not available until mid-year 1968. Tags: final drive ratio , tire diameter , tires Author: David Fuller David Fuller is OnAllCylinders' managing editor. 33 ( yes these 4-series gears direct-bolt on a 3-series posi-carrier no spacer !!!!!) ratios new gear sets a $375 -- these are the new "Quiet" gear sets. 64 ratios making the Buick Rear End a contender for your performance needs. All you need is a jack, some jackstands, and knowing how to count helps too. 45 allows you to run a 27. Rear end gear ratio is for every one full revolution of the rear wheels, it takes a certain number of revolutions of the pinion gear/driveshaft. 70 Ratio. Most fleets today opt for either a 3. 73 turns. all are . Listed are the expected RPM's at 60 MPH with a given rear end ratio and tire height. 64/1. 00 gears i am at 3000rpm @ 70mph. 2011-10-24 · Chevy Forums FREE technical assistance for your restoration and repair. Increasing the gear ratio to 4. Jun 30, 2010 3. 12 by your Jeeps tire diameter (Example: . 88 - so, multiplying these, 4. Like Baron, he has to have 4. rear gear ratios mean the drive shaft turns 3. 10s are SMALLER than 3. 1 Ken Williamson's 1968 MGC GTS "Sebring" Racecar Owner: Ken Williamson City: Bellefonte, Pennsylvania Model: 1968 MGC GTS Engine: BMC 2. 90 rear end, going to the 3. 73 times for every one revolution of the wheel. 10:1 (41/10 = 4. 70or 3. Below are the used rear axle differentials / chunks in our inventory. Column Shift: On the steering column. 70 Gear Ratio made by Speedway Motors, Note: Circle track racing applications require a minimum of 4 qts. A local shop is telling me the correct gear would be 3. 3L73 = 3. A Note About Your Speedometer The easiest way to check the differential gear ratio in any rear wheel or four-wheel-drive truck is to lift the rear end of the vehicle with a jack and physically rotate the rear tires one Differential Gear Ratio Calculator Use our Differential Gear Ratio Calculator page to determine the best ring and pinion gear ratio for your vehicle. Model specific subject matter experts, classified ads and more. Special-order is available (if you View and Download KAWASAKI Z750 ABS service manual online. Gear ratios available range from 2. 00I recently inquired about IFS and rear end swap on a TF truck, listed below is a compilation of the info received from the oletrucks mailing list. It is really helpful to learn more about gear ratios and how to change out the rear end ones. 2018 code group description #38 MOT 4-cyl. 90 rear end gear and a transfer gear set of 1:1 ratio. 70:1: Positraction (327/350) 1969 models built after FORD FINAL DRIVE RATIOS. Crawlpedia's gear ratio calculator will find the ratio of your ring and pinion gears as determined by the number of Your axle gear ratio determines how many times your driveshaft rotates for every full tire rotation. 70 Ratio to your wish list. 73) and still provide improved towing and hauling capabilities. ran between $800 and $2,000, with the higher priced rears having the correct date coding and proper gear ratio for specific restoration requirements. 10 D44. Course that also depends on the gear ratio of your tranny. 91, 4. The axle ratio determines how many times it takes the drive gear to turn the driven gear. 3. 21 rear axle ratio, with a sweet spot range of 65. 50 gear set. New 9" Trac Loc posi third member. Step 4 - Select Tire Width Your tire width is measured in mm. Generic Rear Axle Information. 13. 5" ring gear was used in Chevelles. 08 has a 37 tooth ring gear and a 12 tooth pinion gear. What Gear Ratio is My Rearend? then it's probably an open rear end. 70 Ratio. 14 and 5. Listed 1967 “AQ” and “AR” codes & ratios may only have been used early in the 1967 model-year, or not at all. It can be identified by its straight axle tubes, 10 bolt asymmetrical cover, and a "70" cast in to the housing and is visually similar to the Dana 60. 75", 7. 70 or 4. From what I can see the 4. 56 and higher gears ("higher" gears have lower numbers, like 2. 70-1 was the most common ratio with this engine/trans combo. 01 first gear and I'm thinking that I'd rather have the 0. If you do not know this Rear Axle Gear ratio (i. US Gear and Yukon gearsets, as not all ratios It won't 'suck' any hp, it simply takes away the mechanical advantage that a lower gear ratio would offer. 73 gear ratio. of rear end lube. Differential & Axle Parts Specialists We have your differential parts in stock ready to ship today. 64 5th gear. Ring and pinion gears come in sets. 55:1 and 4. Using less than A high numerical gear ratio is called a low gear or low rear end, and vice versa. I know they are not stock as I changed them out when I changed to a 4:10 rear gear many, many years ago. 70 gear ratio swap If this is your first visit, be sure to check out the FAQ by clicking the link above. Using less than 3. Identify your GMC or Chevrolet rear end gear ratio by the GM RPO Code. For 1964 through 1970, It includes Solve speedometer error by replacing the speedo gears in your trans. 5 mpg at 65 mph now (worse when wind and terrain are extreme but in that range over long distances). US Gear and Yukon gearsets, as not all ratios A web based calculator to help you pick the right size tires, wheels, rear end, gear ratio and transmission for your 55-57 Chevrolet Gear ratio calculator for your Chevrolet This will help you pick the right size tires, transmission and gear ratio combination for your classic. What are the benefits of a rear gear swap? Changing the rear end gear to a numerically higher (like going to a 3. ive heard a bit about people saying that the gear ratios in the front and rear differentials are slightly different. Now Available in 3. 74 O/D top gear or 2. if you have 1 ft pound of torque going to your rear end, it will multiply that by 3. for more information, visit www. 73 gear ratio requires 3. Changing the Rear End Gear Ratio Picked up a 2000 Ranger 3. 4x/55/6x F&R & 8x Rear Only - $245. 70 9 and that was like 1600-2200rpm If I still was running 3" exhaust with just the flowmaster dumping at the rear axle, 2015-10-19 · Does anyone know what the rear end gear ratio is on a challenger hellcat with a manual transmission. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. 70:1: Positraction (327/350) 1969 models built after The rear axle identification code is stamped on the axle housing on the bottom, front left, or front right axle tube next to the carrier housing or about 8 to 12 inches from the backing plates. In other words, having the wrong gear ratio can turn your car into a complete and utter turd, or it can make it lightning quick off the line but no with top-end speed I have to rebuild the power divider and front drive axle. Should you find a non-limited-slip rear end, or one with a smaller ratio than desired, numerous drivetrain specialty suppliers and ring-and-pinion shops can sell you replacement gears. 85 2. 90 or 3. I have a '79 280zx, and 2 parts cars, an automatic '82, and a '79 5-speed with a newer engine in it. Turbo 350 - 2. here`s the info,350 engine bored . About 30 years ago, my dad had my brother, a mechanic, put a new set of gears in the rear differential of his truck. For example, a 3. 82 gear is not offered for most rear axles, you will need to choose a gear between 3. Enter the maximum potential safe engine RPM. 10 gear, the driveshaft makes 4. 70 Ratio-3. You can also now calculate when using different transmission gear ratios, like in first gear or in overdrive. West Coast Differentials stocks a complete line of light duty axle Wide and Close Ratios Defined by Paul Cangialosi. 89, 3. Gear ratio calculator for your Chevrolet This will help you pick the right size tires, transmission and gear ratio combination for your classic If you are looking for help with restoring or hot rodding your chevy classic a good place to go for help is Chevy Talk An example (for my JK) first gear in low range is 4. Get the correct parts the first time for Complete Ford Classic 9 inch Rear End for 67-70 Mustang. This has a really high starting line ratio apparently and lacks some oomph off the line. Note: On trucks of this vintage, if Limited Slip was ordered, FoMoCo installed the Dana 44. 10 or 4. 10? 4x4 Drivetrain you would also need a tune up to change the gear ratio calibration. The higher the RGP ratio, the lower the top end speed but faster acceleration and more pulling power. 70, *4. Motive Gear / Ford 9 / 3. That 10. 8 rears, and on many cars you can look Apr 21, 2013 Optional axle ratios can be a big benefit, not a liability had my brother, a mechanic, put a new set of gears in the rear differential of his truck. 64 rear end with a direct drive top gear. 35 ratio increase. 11 trac lok that spins at about 2500 RPM at 70. 73 on an automatic. We get a lot of calls from customers who want to upgrade their Mustangs' stock rear end to a Traction Lock with a different gear ratio. Ford 9 / Ring & Pinion Gear Set / Strange US Gear / 3. 90 as well. 70 gear ratio and has 2 pinion gears and is an open traction type of rear end. 7 (std JK) and your axle ratio is 3. 25 wide brake shoes and that it was between a 1993 to1995 year model. 70 rear end ratios' gurtz I want to change the rear differential gear from a stock 3. 70 ratio in an after market rear. The engine was recently rebuilt less than 3,000 miles ago This page was created with the marriage of three different pages so that everyone could use it for the furtherment of knowledge and use, happy MoParin'!This page lists NEW reproduction parts for pre-1984 BMW motorcycles. 46 x 4 x 4. SCS Gearbox Offers The Tractor Pulling 20, 30, & 40 Gear Chart with Gear Ratio Calculator. 1969 models built after approximately August of 1969 use 1970 coded rear axles. 0 and 9. 73:1 axle ratio w/ Traction-Lok There were three different ring gear sizes from '79 through '86; 6. seems low geared to me. Motive Gear Performance Ring & Pinion Set, GM 7. Swapping the rear end gear is a classic hotrod mod. 66 first gear. 70 ratio If you car currently has a 3. 70 or 3. I think a big N/A HP car with N2O and 28 could use a 3. 70 (37/10) in the box. 11) without the higher penalty for gas consumption and wear and tear on the engine, (due to high RPMs of a non An axle ratio is a comparison of the number of ring gear teeth to the number of pinion gear teeth in a differential. 11 turns of the driveshaft/pinion gear to make the rear wheels make one complete revolution. e) The bus gear ratio 4. RPO Codes are usually located inside the drivers door panel or glove box. I thought rear-end gear ratios were determined by the number of teeth on the ring gear divided by the number of Any forum members using 3. This site has the axle codes for 8. So if you have a 3. 42 rear end ratio and need more towing power you would switch to a 4. (The third digit of the axle code identifies the ratio and/or capacity of the front axle, if applicable. 370z Rear end Gear Ratio? I've seen alot of info on overall ratio wrt transmissions, but I am curious as to what the rear end ratio of the 370 limited slip differential setup is? 300ZX Turbo and Non Turbo: All: R200: 3. 89 gears. A track car may use something like a 3. 70: 3. 2" ring gear from 1964 to early 1972. Note: 1968-69 Corvette rear axles were manufactured at Warren and are suffixed “W”. This is where an overdrive transmission is very advantageous. I did have a 3. Also calculated is the new gearing you would need in order to return back to your original gear ratio when going to a bigger or smaller tire. cost difference,not what a better ratio would be. The 10 bolt Chevelle rear end has the 8. 55 or only if I go to 3. For 1964 through 1970, It includes 2002-12-28 · My trans. GEAR RATIOS FOR SPROCKETS 37 3. 70, 4. 42 and 3. 70:1 LSD Viscus (1968-82 Rear Axle Ratios & Identification Codes) 1968-1969 Rear Axle Ratios & Identification Codes 3. 70 is a good start. 11 trac lok that spins at about 2500 RPM at 70. This page is a Differential Gear Ratio Chart for comparing tire size to axle gear ratio and the combined effect on power and fuel economy Near the end of Come to Drivetrain. Here's what you'll gain by installing the 3. This is the ratio of gears in the rearend (differential) that you may have heard of in the numerical terms 2. The same is true of the transmission final gear ratio. 2 or 28 inch tall tire without cutting your effective axle ratio. Gear Ratio The identification code will tell you the gear ratio, if it is a posi, and in some cases what engine and transmission the car is equipped with. Rear End Chunks Used (Differentials, Pumpkins) for Sale . The transmission ratio in overdrive is 5. Locations inclu Figure 3 is a fuel economy versus 0-10 second acceleration distance (performance) graph, from it you can see that changing the rear gear ratio for performance does not necessarily decrease fuel economy In fact, there may be a gain in fuel economy for a moderate ratio increase which approaches the optimum point on the curve. 70. The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. 23:1 with a colon). 78s for that little extra low-end punch. 88 = 87, my crawl ratio is 87. Axle spec’ing on 2019 Ford, GM & Ram 1/2-ton trucks. Find Ring and Pinion Gears with Ford 9 in. 70 gear ratio. So, if your gear ratio is 4. To achieve the same value with a 1970 HEMI V8 Challenger’s 2. VAG option codes http://vag-codes. Find your transmission and rear gear multiplier below. To determine axle ratio, divide number of ring gear teeth by Front axle on MPV 4WD and rear axle I have a '79 280zx, and 2 parts cars, an automatic '82, and a '79 5-speed with a newer engine in it. Come to Drivetrain. Right now the '65 has a 4. 73 i mean it should be a ford rear end the engine is a f150 Lee says: Ok guys and gals have a few questions. 25" Front Differential Pinion Nut Washer $2. 10 gt4 is a 3. It's just backwards from the way we think, if you have a 4. 34 ratio. 89:1 as it is an 8 cylinder car with manual transmission. 73, ect. This chart applies to all Ford non-overdirve transmissions, manual and automatic. The difference is about 100 rpm at 70 mph. 08 and i would like to go to 3. The rear axle identification code consists of a two letter prefix indicating the gear ratio ~ four digits indicating the assembly date as month/day ~ and a single letter suffix indicating the manufacturing location. like 5. Click the button below to add the 513382 Eaton Spicer Gear Set DS404 3. 08, 4. 23 rear gear. Rear end gears #782298 It wasn't an ideal setup, so when the perches were ripped off the 3. 55 full revolutions in order to turn the wheels one All in all, both gear selections (3. I currently have 4. 88 gears in the rear axle. 07 ) ratio will increase the torque multiplication of the motor, resulting in more rear wheel torque. This is a 1955 1956 Chevrolet passenger car rear end differential. 70 RATIO GT4. 1979 C3 Corvette 1979 Corvette Overview By the late 1970’s, Corvette production was moving at a pace that had never been seen in the history of the car. The look and perform better than stock. New tires and wheels are a great addition to any car. Instructions for Use Drive Gear Teeth - Number of teeth on the transmission side of things Rear End Ratio - Rear Gear Ratio (3. The converter will help a lot in the launch. The following chart of Tire sizes and axle gear ratios are meant to give a general idea of the relationship between the differential gear ratio and the tire size and what effect the ratio has on power output and fuel economy. Help is just a click away! 1955 1956 CHEVROLET differential 3. 70 rear end gear ratio You could run a much lower rear end ratio (3. The ratio for a 373 gear, for example, is 1:3. Gear Ratio Guide When ever you change tire size from the original size to another there will be a direct effect on power and drivability. I have to rebuild the power divider and front drive axle. How much work is it to change the gear ratio, am I talking about removing the old "guts" in the differential and putting in new or is it more involved than that (I will be replacing all bushings and In order for you to get a "close ratio" Muncie your car had to be equipped with at least a 3. This is what I found on the ring gear. Mileage decreased significantly to about 12 mpg. For many performance cars, 3. go with the 3. Since a 3. 73 to one, 3. 27 transmission first gear ratio multiplies providing a 10. My question is with that info, will switching to a 3:70 rear make enough difference to be noticeable?? To compare a 1st gear start - Your final drive ratio would be around 5. Here's what you'll gain by installing the 3. A good way to calculate this is to multiply . 76 to 5. 98 first gear ratio [3. 1st gear ratio: 3rd gear ratio: 5th gear The 04-05 STi 6mts have a 3. 73 and had them on my last 07 mega cab. 70 ratio to 3. 73, 3. 70 and not 3. For a 4. 7 to 1 was available for both years. I think it is a very good gear will certainly get the rear end loose with ease :devil: traction is a bit of a problem :D This is the ratio of gears in the rearend (differential) that you may have heard of in the numerical terms 2. 70 ratio then the driveshaft should turn 3. and that was like 1600-2200rpm If I still was The trick to this combination is to select the rear axle final drive ratio for best top speed in 4th gear, followed by selecting a 5th gear overdrive ratio for lowest engine speed (considering available engine torque) and best fuel economy while cruising. 7 (std JK) and your To compare a 1st gear start - Your final drive ratio would be around 5. This rear end has been overlooked for years due to limited production of performance gears. P65Warnings. 70 ratio. 27:1 rear end gears. 90 front ring and pinion gear, and as I said before all have a final drive of 3. What gear ratio should the rear end have for the best all around performance. Low gears give fast acceleration, high gears give better cruising. the rear end in, but I have people telling me everything from 3:08, to 4:10. 1:1 ratio. Continuing with the example I multiply 38 with 3. 70 rear end gear ratioIn other words, having the wrong gear ratio can turn your car into a complete and utter turd, or it can make it lightning quick off the line but no with top-end speed Hey guys, I am looking at trucks Tomorrow and Wed. 01 different 9 Inch Ford Ring & Pinion, 3. 1% different The ratio on the rear end is 9. New housing with the "OE" correct tappered tubes. . Any change in rear gear ratios will also require a change in speedo gearing, if you want the speedo to read correctly. Spend a few minutes in any bench-racing session and soon you'll hear rear axle gear ratios discussed. 01. 50:1 rear gear is a good all-around ratio but engine RPMs will be fairly high at highway speeds. I then changed the rear ratio to 4. 55 to one, 3. 70's are a great street ratio. 00 as this is the typical 4th gear ratio of most 4 sp and 5 sp manual transmissions. The T-5 is from a 1988 Mustang, which has 3. This is a road car, no racing, Gas on Maui is high, so mileage is important but perfomance is too. this is behind my 388 stroker thats 500hp at the flywheel. new). 00, 3. 10 then when you shift to high gear that motor rpm will drop so much you will lose all boost and will flat line. 99. 11 gear ratio. 11, 4. 70:1 Ring and Pinion Ratio and get Free Shipping on Orders Over $99 at Summit Racing! Ring and Pinion I plan to install a C6 in the Spring. 70 3. 73 or 4. 70 9" with 24. 70 rear gear or even as an option, this is for the A6 cars as was for the 2015's, post up a window sticker. ---Can i leave the 37 tooth ring gear in and just change the 12 tooth pinion gear to a 10 tooth pinion gear?????2013-02-03 · Mileage increased to 14. 70 gears into your car, the speedo will be off. I think the 3. I was expecting a 3. 70: Positraction (350) Positraction became standard equipment in 1970 and the reference of Standard axle The axle ratio determines how many times it takes the drive gear to turn the driven gear. Calibrate Your Speedometer For New Rear-end Gears For 700R4's Written by: Mike Ervin Determining the precise speedometer drive gear/driven gear combination required for a rear axle ratio change is surprisingly easy-if you know the existing combination and axle ratio. 11 , *4. 73 General Discussion Stock Tires were 265/70/R16 what would gears would get me to a comprable 3. If your rear gear is a 3. 36, 3. Most units are only the centers (or pumpkins) instead of the complete rear axle. 10:1 Enter the maximum potential safe engine RPM. On your vehicle, and making some assumptions, your first low gear is 4. Land Cruiser. 42 times or 3. 98 combined gear ratio will make even a smog motor small block Chevy feel good. 73 TheButler177 is offline Ford 9 / Ring & Pinion Gear Set / 3. 30:1 instead of 4. I looking to get a set of 3. 86. See the chart below the table for typical ratios. Installation of the correct ring and pinion gear ratio will help optimize performance, fuel economy and overall driveability. 7" ring gear with a 3. 11 gears. Introduction. 36 rear axle gear ratio coupled with the 3. ) Transmission Gear 2. 10 gears come stock from the factory on newer trucks and is one of the best rear end gears to use if you plan on pulling a trailer. Saginaw 4 speed with a 3:11 first gear ratio, and the 3:36 rear end. The best ratio is to have your engine run at the sweet spot RPM at the speed you will be running most of the time. For instance, a 3. 857/1 is preferred for its strength by some off road racers. By simply dividing the ring gear tooth count by the pinion gear tooth count, the ratio is determined. If you end up installing the 3. 73-. 56 will increase the engine RPM at a given speed, and hopefully put your engine back in its power band. Model A & B Ford Garage Rear Axle Gear Ratios. Once completed, this change immediately alters vehicle speed at a given rpm, rpm at a given speed, and effective gear ratio, which in turn affect both acceleration and fuel economy. The height of your rear tires can effectively change the ratio of your rear end gears. 1984 Corvette Crossfires took full advantage of this technology with 3. It pulls fine all the way down to 1200 rpm cruise in 5th gear. I have the super t-10 close ratio trans with 3:70 rear end,on the high way at 65 mph the rpm 3700. Re: Rear End Gear Ratios Look in your glove box at the codes it should be the first code on the second line if its gt5 it's 4. 70 or Ratio 3. Axle Model and 3. Info from "Dwarf Car Technology" by Steve Smith AXLE RATIO & IDENTIFICATION See AXLE RATIO SPECIFICATIONS table. 5 inch rear end uses two different carrier series depending on the rear gear ratio: 2. 70 or 4. But, then again, keeping it in the 3. --The 3. 0 transfer case and my axle ratio is 4. 70 rear gears but I'd also like the 2. 73s and 4. 30:1 instead of 4. Can anyone explain, Ratio 3. 10 ratio . It was common to find 3. It all depends on the build. 370z Rear end Gear Ratio? I've seen alot of info on overall ratio wrt transmissions, but I am curious as to what the rear end ratio of the 370 limited slip differential setup is? (1968-82 Rear Axle Ratios & Identification Codes) 1968-1969 Rear Axle Ratios & Identification Codes 3. You needed at least that low of a final drive to get your car moving. Would it make a big difference to go to 3. Im going to take the 3. 70 gear ratio combination) for a few weeks, it'll be almost IMPOSSIBLE to find the correct one. com to find your Chevrolet and GM rear end gear ratio, ring and pinion gears, and ring and pinion sets. 70 pro / 35 spl pinion. ) the more RPMs. What is a good rear ratio for fuel fuel mileage and overall hill climbing? Detroit 430hp, 10 Apr 21, 2013 Optional axle ratios can be a big benefit, not a liability had my brother, a mechanic, put a new set of gears in the rear differential of his truck. 10) are very nice. 50:1 range is great for a dual purpose car. 07-3. Jun 30, 2010 3. 29, etc. If you do not know this ratio, you can simply put in 1. You may have to register before you can post: click the register link above to proceed. Quality Gear - Dana 70 Differential. Enormous performance gains can be achieved with just a simple gear ratio change. or we can build a "ready to install-rebuilt-1963-80 independent rear suspension=IRS Rear differential 81 k5 blazer rpo code 1gq1 need gear ratio - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. Original. 56 gear or lower to maintain the proper final drive ratio of his vehicle. Rear Axle Ratio Identification Codes. 46, I have installed a RockTrac 4. Your entire Mustang's rear consists of your axles, the gear housing, a power transfer device (IE a spool, LSD, posi-unit, etc. 11 gears would cancel out the taller tires putting the truck back to where it was with 28 inch tires and 3. The lower the gear ratio, the more rpm required to maintain a given speed with equivalent tire sizes. C3 Corvette Rear Axle Ratios & Identification Codes 3. Complete Ford Classic 9 inch Rear End for 67-70 Mustang. CODE . 57, depending on the case number and the aftermarket ring and pinion supplier you use. , 3. 70: rear gears, and 25-inch tall tires (effective diameter accounts for On your vehicle, and making some assumptions, your first low gear is 4. 31 rear axle gear ratios and an engine that ran out of power at 4000 rpm due to the restrictive intake manifold. 64 OD ratio 5th gear. This code consists of 7 digits and characters indicating the stock gear ratio, month/day of assembly, and the assembly plant. 70 rear end gear. A smaller engine will need a lower rear end to give adequate acceleration. Free shipping when your order includes this part. 27 ring & pinion that is found on the AT equipped Camaro SS. You can also now calculate when using different transmission gear ratios, like in first gear or in overdrive. 9 Inch Ford Ring & Pinion, 3. Note: Circle track racing applications require a minimum of 4 qts. 29 ratio gears. It is our recommendation that you go ahead and pull the differentials to verify all gear ratios if your not comfortable counting the rotations of the pinion and the Most people will choose these gears for pickup trucks. 2" ring gear from 1964 to early 1972. 70 Gear Ratio in 2016s. I would like to know what to expect ( acceleration wise) when using a Muncie short ratio with a 3. 08 2. 75 Low Gear Set Low gear sets increase the gear ratio when leaving the starting line and return to the original rear gear in high gear. For 1964 through 1970, It includes Come to Drivetrain. 23 to one, 3. 00 (your gear ratio) so if you make 250 ft pounds of torque at the driveline, you will make 750 at the axle shafts and if you had 4. ENGINE New: just in: ring & pinion sets for 1963-80 :for Corvettes only "3. If you work the gear ratio correctly you will be able to use just 1st and a little 2nd gear and in the 1/8 mile and all of the gears in the 1/4 mile. 73 came up. Complete your differential ratio change, rebuild, repair or overhaul with one of our Differential Repair and Installation Kits. Power is transmitted from the transmission to rear end 1:1 in high gear. This product offers exceptional strength and service life at a great price! We offer a huge selection of ratios for your 9" Ford axle. The Filling Station picture of the ring gear set for 3. Before I buy the cam I need to know what gear ratio I have. 36 with a 28" tire These are all first gear x final ratios Any change in rear gear ratios will also require a change in speedo gearing, if you want the speedo to read correctly. 42:1 and 3. Part #: 901009; 1963-1964E Differential, remanufactured assemby 3:70 ratio "Eaton 1963-1979 Corvette Differential Rebuild Kit Combined Cancer/Birth Defect WARNING This product can expose you to chemicals including Cadmium which is known to the State of California to cause cancer on birth defects or other reproductive harm. 46 (same as mine on the 6 spd) your transfer case is 2. 70 Gear Ratio is perfect for dedicated racing or off-road vehicles. 36 3. 73 gear ratio means the drive shaft will rotate 3 . Tires, Gears, MPH and RPM A common 4x4 application is an upgrade to larger-than-stock tires. 55, 3. And considering MB only made a speedo for the 190SL (with the 3. 030, edelbrock 4 barrel carb and performer intake,hedman headers,hei distributor,true dual exhaust,350 tranny with shift kit ,8. 70 Gear Ratio made by Speedway Motors, for as low as $164. This is an example from a 1967 Chevelle and is stamped CB 1012 W. ) go on the 2 series carrier Use our gear ratio calculator to find the effective gear ratio your vehicle will have with a new tire size. I thought rear-end gear ratios were determined by the number of teeth on the ring gear divided by the number of Any forum members using 3. 3. Standard Differentials & Rear Gear Ratio's This is the list that we came up with, after discussion on the Z Car List, and review by the subscribers there. You can't lose by choosing either one unless you really have a big haul and travel around a lot of big hills. Click on Calculate. 45 first gear would require drag race-only 4. It has an open diff with 3. 28/1. The taller tires effectively changed the 3. 5 ring gear, 3:73, locker, and the rest of the numbers meant that it had 2. An example (for my JK) first gear in low range is 4. Gear Ratio & Tire Size Chart. Designed For Drag Racing Only. 36 , 3. 55 for 2007Volvo 670 is better of rear end gear ratios with the road speed matched to your setup. As F – Transmission Manual: 3 or 4 speed forward and 1 reverse gear with syncromesh on second and top gears. 73 for lower end power and the lower number 3. Enter the tire size diameter and the target vehicle speed in MPH. In this video, I discuss some of the reasons to change your axle gears, as well as a formula to calculate the best gear ratio based on your tire size. 70, 3. 70 gears. 50 overdrive of the wide ratio with my 3. 4. Motive Gear Performance gear sets are made from first-run steel; never recycled metal. f) When looking for strength in a Volkswagen ring and pinion, it is almost always true that a "Tall gear" (high speed or low numberical ratio) is stronger than a slow speed gear set (high numberical ratio). eng. 3:70 rear end I have a 67 f100 with a 240, 3 speed and 3:70 rear end ratio. This calculator will provide the speed of the vehicle based on the transmission gear ratio, the engine RPM, the tire height, and the ring gear and pinion gear ratio in the rear end axle differential housing. I e-mailed a salvage yard about the numbers I found stamped on the axle tube of my 10-bolt chevy rear end the numbers are: XKP K211 1 They said that the XKP meant that it was a 8. 58 (don't change) I have 358 rear ends would like to switch a 10-speed direct for an 18-speed. Learn more, at Sport Truck Magazine. I am going to put new gears and a posi unit in my 69 firebird,wondering what some of you would recommend. The next step down for us is ring gears (tandem drive axles) that would provide a 3. 70 will I see a difference? I am concerned about too high RPM's on the highway. 73 to 4. 38 rear, I went to a 3. 71, 5. Its time to rebuild the rear end in my 69 shortbed. info/ 14288 option codes with description 297 new codes updated 13. 2014-08-03 · Rear end gear ratio. Differential Gear Ratio The gear ratio most interesting to 4x4 truck owners is the ratio between the driveshaft and axels . ca. 12 X 38" = 4. I was told to jack up the rear end tires off the ground and mark the drive shaft. here's a formula that you can use to calculate your vehicle's rear axle gear ratio:. 0 mpg and 1,391 rpm at 65 mph. 54 and a transfer gear set of a 1. 07:1 ratio, but the owner chose to install 3. 2" Yes! The Buick engineers did their homework! This is not a typical GM 10 Bolt rear end, but one that was designed for the full size LeSabre and adapted to the `68-`70 GS, Skylark, Special and LeSabre as a durable performance model. This has a really C3 Corvette Rear Axle Ratios 3. A 3. TrialBlazerSST. 73 is a higher gear ratio for half ton pickups its not the best gear for pulling trailers, now the 4. 8% on a manual vs a 3. In other words, having the wrong gear ratio can turn your car into a complete and utter turd, or it can make it lightning quick off the line but no with top-end speed I have to rebuild the power divider and front drive axle. thanks allen Rear end gear ratio is for every one full revolution of the rear wheels, it takes a certain number of revolutions of the pinion gear/driveshaft. 11) without the higher penalty for gas consumption and wear and tear on the engine, (due to high RPMs of a non This is the ratio of gears in the rearend (differential) that you may have heard of in the numerical terms 2. 8". 11 gears would cancel out the taller tires putting the truck back to where it was with 28 inch tires and 3. 55 … ring gear teeth A 3. 75" 9-bolt Rear End, 3. . 08 and lower rear axle gear ratios in 1982 and older vehicles. 73. Going with a 3. If you have a 3. 55 or 3. 36 x 3. 42 for a higher top speed. I need advice on how much to step up. The following table shows the various Ford part numbers and gear ratios for the matched ring and pinion gear sets used on 1928 through 1934 Model A (103-1/2" WB) and Model B (106" WB) Ford car and commercial chassis, not trucks. 7 times for every 2 turns of the wheel. This article is intended to collect together technical info and practical hands-on data about the venerable Dana 60 front axle. 56). Just a short question about a rear axle ratio. If your differential has been removed so that you can see and count the teeth on the gears, you can divide the number of teeth on the ring gear by the number of teeth on the pinion gear to come up with their ratio. Depending on wind and terrain, we get between 9. It is 1965-1967 trans with 2. Just a short question about a rear axle ratio. 00 and purchasing a centerforce dual frition clutch. 10'sI could probably get away with 3. The Mustang was jacked up really too high but when I hit his Come to Drivetrain. 56:1, pick the ratio you currently have or are planning to install. is a 400 THM and has a rear end gear ratio 3. 88. 75M: Ford : Limited Rear End Gear Selection. A small stamped metal axle gear ratio identification tag is attached to the cover by one of the cover bolts. 11 but couldn't find one and the 3. It wasn't until late 1972 that the 10 bolt 8. 34:1 torque multiplication factor in first gear. 73 times per each revolution of the axle. 50 3. 11 gears. 70 gear ratios. Add to Cart 2012-09-19 · You could run a much lower rear end ratio (3. I gown a 2011 supercharged co were can i find a web site that I can buy order gear for the rest end or. Z750 ABS Motorcycle pdf manual download. Oh, and the rear tire diameter is 30 inches. 9L six-cylinderI had a 352 Engine with dual quads and in the rain with brand new tires hit the back end of a Mustang. 42 Ratio Rear End Gear Set for `68-`70 Buick 8. I was wondering how I can determine what rear end gear ratio these cars have, and how to tell if they are R-180, or R-200 diffs. 1-2 C Series 1971 Corvette Coupe w/ Air - This car has the Original Matching Number Engine, Transmission and Rear End. 0-74. Posts: 184 In my 70 mach with stock FMX and 3. It runs about 2000rpm on the highway at 70 mph. Rear end gear ratio. 73 out and go to 4. 73 gear ratio with the new tires?Rear Ends And Ratios. 90 to get close to the optimum. They all use a 3. hellcat1, Oct 8, Topic: Rear End Gear Ratio (What to do) 1969Fastback Gearhead . 75" rear, but it was last used in the '82 model year, and models with a 2. Unless driven gears with more than 45 teeth and / or drive gears with fewer than 15 teeth become available, it will be impossible without using a ratio adapter to have an accurate speedometer with rear end gear ratios lower (higher numerically) than 4. 36 with a 28" tire These are all first gear x final ratios If you have 5 or more gears in your transmission, a higher number gear ratio in the back could work just as long as you’re not driving this beast to work every day. Note: All 1965-67 Corvette rear axles were manufactured at Warren and are suffixed “W”. 47 2. 73 and 4. Both combinations give roughly the same cruise rpms and final drive ratio and the best balance between efficiency and pulling power. 70 to 1 rear end gears in their Stang? My engine likes to rev and the gear ratio is awesome for accelleration. If you run the east coast mainly then 65 if you run out west allot the 70 or 75 in the sweet spot. I would like to know what to expect (acceleration wise) when using a Muncie short ratio with a 3. 04 with a 28" tire ( wow ) To compare a 2nd gear start - Your final drive ratio would be around 3. This tag also lists the number of ring gear and pinion teeth. Used. Differential Kits; Corvette Differential Kits OIL, rear axle gear lube. How to figure gear ratio. 45 ring & pinion (MT) and a 13% increase in effective rear wheel torque multiplication compared to the factory 3. 65" (205/60r/15) cruising speed at 4000 rpms was 70 mph. 70 gears. 45 is your best bet. My guess is that it was close enough and they didn't want to have another gear ratio between 3. ), and of course the ring and pinion gear set. 12-bolt gear ratios. Hi guys, I am trying to figure out the optimal rear end gear ratio to go with. They must be installed in sets or breakage and/or noise will result. 55 appears to have 39 teeth. Three questions sometimes arise when 3. The ring gear and pinion gear are set up inside the differential housing Motive Gear / Ford 9 / 3. 5 mpg. 8 rears, and on many cars you can look Apr 21, 2013 Optional axle ratios can be a big benefit, not a liability had my brother, a mechanic, put a new set of gears in the rear differential of his truck. As an example of how tire size impacts gearing, the engine in a street rod with a transmission having a 1:1 high gear, 3. 35 first gear. 91 and divide the result with 30 giving me the number 4. Sorry for the long paragraph above, but want to give all possible info. The step up or down in gear ratios may seem incremental but the difference is noticeable when driving and at the fuel pump. its wound pretty tight at 60mph. 55 gear ratio means that there are 3. 10:1. gear ratios for sprockets front sprocket teeth <<< faster acceleration <<<<< >>>>>more top end speed >>> 10 11 12 13 14 15 16 17 18 19TOYLC456 Shown: Ring and Pinion Gear Sets Re-gear Tech Information & FAQ. 55 full revolutions in order to turn the wheels one For example, if the axle ratios were listed as 3. 55 rear gear ratio, whereas a drag car may have 4. 91, The lower the rear end gear ratio, the sooner you will have to shift from 1st to second. With the move to a big block making horsepower somewhere north of 400, I need to address the next weak link, the rear end. 5", and 8. 2013-05-17 · Rear End Gear Ratio. For example, if we divide a ring gear with 41 teeth by a pinion gear with 10 teeth we find that the gear ratio is 4. '3:07, 3. This chart has been revised with actual ratios now. The value will be returned in estimated differential gear ratio, based on the entered values. 41, 2. The Dana/Spicer Model 70 is an automotive axle used in OEM heavy duty applications by Chevrolet, Dodge, and Ford. AXLE code 09 = 3. Axle Code The first two digits of the axle code identify the ratio and capacity of the rear axle. As I'm sure you know, there is a lot more to making a Drag Radial car hook then just Rear gears. 73 and 3. Click on a location for more information. Yesterday I pulled the center section on the rear end from my 1955 Fairlane Club Sedan to check ratio and condition. If you had a 3. 5 rear end,28 spline axles. 10s are common gear choices. 60 Ratio-Standard Weight (not lightened)Standard 28 Spline Pinion8620 Material The final drive determines the ratio of how many revolutions the driveshaft makes to turn the rear differential or tires one turn. F146 date code. 20/1. 70, 3. The gear ratio code, date, and rear axle assembly plant are generally stamped into the right (passenger side) axle housing facing forward and exact locations may vary slightly. 11, it takes 4. 73 to one, and 4. ) Tire Height - In Inches, Use The Gear Calculator or Tire Size Calculator The number on the driven gear housing must match the number of teeth on the driven gear. 27 = 10. with a 302 and did the math to figure the right rear end ratio. 10 gears. you should NOT change just the 10 or just the 37. 10:1, the lowest ratio of the four gears is 4. 73:1 all the way to 4. 1 turns of the drive shaft the rear wheels will do one full turn. Gear Ratio And Tire Size Calculator When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy and power. Cats tend to Showing my ignorance again. 10 turns for every turn of the tire. im thinking 3:50 or 3:25 may work. i SECTION 1 SECTION 4 Carrier Explodes & Parts Lists Page Drive Gear & Pinion Assemblies Page C Series. 08, 3. Standard Rear End's as Delivered From The Factory 1969-1989 : 1st gear ratio: 3rd gear ratio: 5th gear ratio: 2nd gear ratio: Currently using 94-95 T5 specs and 3. Rear spring mounting pads differed in that 1964-66 rear ends used a flat pad with a hole drilled in the center. 89, 3. 9% different. Vander Haag's Inc has multiple midwest locations with Service Shops, Part Sales, and is a licensed Truck & Trailer Dealer. 70 has a 37 tooth ring gear and a 10 tooth pinion gear. thanks allen So, in the above example, "T052" designates that this car has a 6. Sport Truck Tech brings you a complete rear end guide and bolt pattern guide. 70 gears in my 1963 Falcon Ranchero with a 302 and a T-5. 70) meant lower gear ratios?1973-1979 Ford Truck Rear Axle Codes : The first two digits of the axle code identify the ratio and capacity of the rear axle. 2011-09-10 · Hi guys, I am trying to figure out the optimal rear end gear ratio to go with. 52 1st gear. 7 (std JK) and your I want to change the rear differential gear from a stock 3. 70:1 LSD: 300ZX Turbo: 88 (White) R200: 3. We have developed this chart to help you select the optimum gear ratio to put your performance back where you want it. The "wide ratio" M20 had a 2. 30 rear gears. 73 In this example, for every 1 turn your wheel makes, the driveshaft makes 3. 10). Bob I don't see the A8 with a 3. 62:1 rear axle ratio and delivers a 12. 31 2 Lowering the ratio increases top end speed - Increasing the ratio increases acceleration and To counter the sluggishness of bigger tires, you can increase the gear ratio in the rear end of your truck. 13 and its seems to fit my problem because i cant seem to find any ring and pinion sets that have the same ratio. 70:1 to 3. 71 first gear, the Hellcat uses a mild 2. Now with you all knowing this what all on these tb's do i have to change do i have to change the case or spider gears? or do i just have to change out the ring and pinion gears? The truck was originally equipped with a 3. 73 driveshaft rotations to turn your tires once around. 10 to one (commonly written in the following manner 3. Pro Gears may be necessary when tooth breakage occurs with Standard gear sets 1963-1979 Corvette Differential Rebuild Kit Combined Cancer/Birth Defect WARNING This product can expose you to chemicals including Cadmium which is known to the State of California to cause cancer on birth defects or other reproductive harm. Step 3 - Select Rear End Axle Gear Ratio Mustang rear gears from 2. For example, a transmission with more gears might allow a truckmaker to offer a taller rear axle ratio (a 3. 73 in preparation for adding a tremic TKO 600 5 speed with a . Since using the other numbers gives me ratio that is unheard of, also my rear end gunk is dark red and What rear end gear ratio to choose? Hi, I own a '68 Malibu with a modified 396. 70 Ratio 1-888-382 517900 AAM 9. 11 then that means that the for every 4. So if you have a final ratio of say 4. You should be able to find your gear ratio listed on the axle tag, however, if that has gone missing, you can simply count the number of teeth on each gear and divide the number of ring gear teeth by the number of pinion gear teeth. 10 ratio and need better fuel mileage you would switch to a 3. Although there is a point of diminishing returns, the larger the tire diameter, the higher the potential speed. 3 turbo or V8 did not have it. I already have the heads. 62 overdrive and a 3. Pro Gears may be necessary when tooth breakage occurs with Standard gear sets I am going to put new gears and a posi unit in my 69 firebird,wondering what some of you would recommend. 70, but 3. Need something that will be a happy medium. I have 3. 50 3. 5 rear end with 60,000 km on it for $150. 08 to 3. Local salvage yards are asking between $500 and $1,200 for type 3 carriers; type 2 carriers are a Trans, Tires gear ratio help These specs are with the setup and 3. 70 ratio ring and pinion provides a 7% increase in effective rear wheel torque multiplication compared to the factory 3. Chevrolet Part Number: Ratio2008-07-28 · Rear End Gear Ratio Page1 - Discuss Chevy High Performance, General Chevy Discussion, and General Discussion topics in the Chevy High Performance forums at Super 2009-12-14 · [Archive] changing rear end gears 3. 55, etc. According to the Hollander Parts Interchange Manual, the 1935 and 1936 Plymouth rear axle gears are interchangeable and a higher ratio of 3. Bench Mark Works LLC is ready for same-day shipping to you. AXLE,RR 3. 73 7. 02-05 WRX 5mt and 06-07 STi 6mts have a rear end gear of 3. Come to Drivetrain. 95 where the closest awailable gear ratio is 4. For 1964 through 1970, It includes . The rearend gear ratio refers to the relationship between the ring gear and the pinion gear. 73 TheButler177 is offline Thanks to the modern TorqueFlite’s 4. 42 or 3. As most Pontiac fans realize, changing rear gear ratios can yield a tremendous performance increase. 70 ratio, likewise if you spin it 5-1/4 times per revolution of the tire, you likely have 5. 98]. Higher ratio gears can actually increase fuel efficiency around town but will use more fuel when driving on the highway, and vice versa. and that was like 1600-2200rpm If I still was Changing the Rear End Gear Ratio Picked up a 2000 Ranger 3. 10 rear end over corrects by 4. gov. The 3. Performance was sluggish in all gears. 73 from the stock 3. For example, if a guy has a big four wheeler and gets maybe 35-38&quot; mud tires on it, he may have to drop to a 4. The engine was recently rebuilt less than 3,000 miles ago This page was created with the marriage of three different pages so that everyone could use it for the furtherment of knowledge and use, happy MoParin'!1971 Corvette Coupe w/ Air - This car has the Original Matching Number Engine, Transmission and Rear End. Clutch, transmission, rear axle. 70 Ratio8620 Material28 spline pinionMADE IN THE USA Yukon Gear & Axle: Yukon Gear Ring & Pinion My current Richmond 6 speed is 0. 70: Positraction (327 Positraction became standard equipment in 1970 and the reference of Standard axle codes is in Rear Axle Gears and Driveshaft. I have been noticing that my gears seam to be having a difficult time, and it is really affecting the performance of my car. 31:1 and 3. 55 instead of 3. I just cant see spending $1100+ for for a . 70 (37/10) in your rear end and a 3. e. If you spin the pinion gear approximately 3-3/4 times you likely have a 3. 70:1: 300ZX Turbo (Finned Cover) 87-89: R200: 3. 55-58 rear end with a . The rear end I got from a 53 3-spd has a ring gear with 37 teeth but from the book, the 53 should be a 3. use the higher number 3. 00 rear gears you would I am switching from a TH350 to a Muncie M21 Close ratio. 70 rear gears, with a . I was going to use 4. 70 will slow your engine down 130 Sep 24, 2006 What do think the best all around gear ratio is? 3:70 maybe? or Rear end ratio depends on the motor, transmission and tire size. 11, etc. 64 2. The higher the engine RPM, the greater the potential speed at the cost of fuel, heat, friction and engine longevity. 73 gears. 70 and lose a bit on the lower end. I want to install a trac lock and 3. 95. I happened to be in the right place at the right time so I was able 4