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. GT5 Rear Axle- 4.11. Calculate Rear End Gear Ratio Needed. D. Originally it a a straight six … A good way to calculate this is to multiply .12 by your Jeeps tire diameter (Example: .12 X 38" = 4.56). Divide number of teeth on ring gear by teeth on pinion for ratio. 2007 2500HD "Classic" 4x4, LBZ/Allison, CC/SB, It carries the greater portion of the weight of the car. ... Use our Differential Gear Ratio Calculator page to determine the best ring and pinion gear ratio for your vehicle. Approximate rear end widths measured from backing plate to backing plate. Only show this user. There is a code of 2 letters on the right front of the pumpkin which tells you what the original ratio of that pumpkin would be. I keep getting questions from people who want to know what gears thay have and where they can find a posi unit. Example. 1978-87 Rear Differential - GM 10 Bolt with 8-1/2" Ring Gear. TM Tire Diameter Choose The Gear Ratio That Is Best For Your Vehicle When selecting a Gear Ratio, you should consider the following: 1. For example: Loves to cruise about 3500 rpm's. Come to Drivetrain.com to find your Chevrolet and GM rear end gear ratio, ring and pinion gears, and ring and pinion sets. When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy and power. Instructions. The choices are 3.73, 4.10, 4.56. Nov 26, 2002. EXAMPLE With Overdrive (30%): 1800 RPM / 656.93811 = 2.73:1 x 130 = 3.54:1 Use our simple Gear Ratio Calculator to quickly find the correct gear ratio for your ring and pinion gear set. They are 2 completely different systems. If it turned 4 and a quarter times, it's a 4.25:1 ratio. Select the value you want to solve for. The 4 series ring gear is thicker than the 3 series, hence the spacer. In some cases, there is an additional … 2,610 satisfied customers. The 700r4 and the 4l60e are essentially the same transmission as far as the gear ratios are concerned. The recirculating ball/nut manual steering gear ratio was 24:1, with 4.8 turns-to-lock and optional power steering was 17.5:1 with 3.5 turns-to-lock. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. A ratio of 4.56 means that as the axle turns one whole circle the driveshaft turns 4.56 circles. The ratio should be stamped on the ring gear also. You could find out what axle ratio your truck has by looking at the axle … The value will be returned in estimated differential gear ratio, based on the entered values. Technical Rear End Gear Ratio The Hamb Organized Gear Tooth Size Chart Diff Gear Ratio Chart Chevy Stock Rear End And Gear Ratios Ford F150 Forum. The 1962-63 serial numbers are located on the front, right side of the differential carrier. Using the chart below, first determine your original gear ratio and tire size and follow to the intersection … With our RPM calculator, you can calculate your engine's RPM based off of your vehicle's speed, tire diameter, rear gear ratio, and transmission gear ratio.Keep in mind that our calculator does NOT take into account drive train loss, road and weather conditions, or the skill of the driver. 1 more for now Another question would be do you know a site where I could find out exactly from the code what rear end it is and the specs on it ( gear ratio) its a 12 bolt as well and also is the correct number just one letter and than 2 numbers? … 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. West Coast Differentials stocks a complete line of light duty axle parts for Chevrolet, Chrysler, Dana, Ford, GM, Jeep and Toyota and more! Only 53k miles. Gear Ratio Selector TM Winners Run RICHMOND! Enter the maximum potential safe engine RPM. Yukon Gear & Axle GM 9. 1973 - 1987 Chevrolet Truck Specifications. Your basket is empty. This is especially helpful when trying to identify a gearset that needs replacement with the same ratio ring and pinion. I hope this chart will help you find what your looking for. The 700r4 and the 4l60e are essentially the same transmission as far as the gear ratios are concerned. 10 rear axle has a 1st gear transmission ratio of 3. Don't want to go there. Only show this user. Turn the wheel TWO revolutions and count the number of driveshaft turns. This chain drive transfer case's overall length of the NP203 case is 22"-23" from the face of the case to the rear output yoke's center. What is Chevy Rear End Gear Ratio Chart. The gear ratio most interesting to 4x4 truck owners is the ratio between the driveshaft and axles - the differential gear ratio or axle gear ratio. Search: Chevy Rear End Gear Ratio Chart. The choices are 3.73, 4.10, 4.56. Click on Calculate. Can someone tell me what gear ratio this rear end is? came with a .373 gear ratio regardless of trans. Enter the tire size diameter and the target vehicle speed in MPH. But be aware, a 4:56 gear will cause your engine to scream at high rpm at highway speeds. This chart is in the Service Manual. As you noted, if you buy a junkyard axle, you'll need to match gear ratios if your Tahoe is 4wd (if it's 2wd, then you can put whatever gear ratio in you want/find). 30 usually , is there a rare. It has the 4. Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Tire diameterTransmission type as well as individual gear ratiosTorque converter stall speeds (automatic), etc. The gear ratio of each overdrive gear of your transmission. Please feel free to call toll-free (800) 874-8888 … Counting down the spikes of the two gears and dividing the larger number by the smaller one is a gear ratio finding hack. 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. The G80 code in passanger cars indicates LSD. Input your stock and new tires sizes along with your original gear ratio. Differential Gear Ratio. The standard gear ratio for a 4x4 is 3.73. The 10-bolt, 8.2-inch differentials use .375-inch right-hand thread bolts in the ring gear. To get an accurate ratio estimate with only one wheel jacked up, it's necessary to turn the rear wheel twice and count the driveshaft turns. This chart applies to all Ford non-overdirve transmissions, manual and automatic. Axle Type: Ratio: G11 Transaxle 2.56 G44 Rear Axle 3.07 G72 Rear Axle 2.14 G75 Rear Axle 3.62 G82 Rear Axle 4.56 G84 Rear Axle 4.10 G90 Rear Axle 3.15 G91 Rear Axle (HWY) 3.08 G94 Rear Axle 3.31 G96 Rear Axle 3.55 G97 Rear Axle 2.73 GH0 Rear Axle 3.54 GH2 Rear Axle 2.29 GH3 Rear Axle 2.77 GH4 Rear Axle 2.92 Rear Axle Assembly Codes. of torque to the pinion gear and the gear ratio of the ring-and-pinion is say 4.12:1, the output torque is 412 ft./lbs. Dec 6, 2018. Calculating the torque multiplication that your axle gears provide is quite easy. Listed are the expected RPM's at 60 MPH with a given rear end ratio and tire height. All the rest of the ratios will have the code for them. they need to use the low gear ratio to multiply the little amount of torque the 4cyl puts out. The conventional ratio for a 3 speed tyranny in a 1954 auto was 3.73. Chevy 10 bolt rear end gear ratio chart. I would imagine that with a 29 inch tall tire a 3.42-3.73 would be in the neighborhood you’d want to be in. A standard transmission had no tag and was a 3.70 ratio. GT4 Rear Axle- 3.73. 60" 60's GMC and some Chevy's Dana 44 or Dana 60 with leaf springs 6 lug, Gear ratio's 3.21 to 3.92. gear ratio: The number of rotations of the crank arms per revolution of the rear wheel. I couldn't tell any difference in the engine rpm's. Posted April 18, 2019. Keep in mind, our calculator is based around a 1:1 transmission gear ratio or “direct drive.”. This chart is in the Service Manual. Enter the maximum potential safe engine RPM. Multiply this number times two equals ratio. Calculate RPM for Given Speed(MPH), Rear Gear Ratio, and Trans Gear Ratio. they need to use the low gear ratio to multiply the little amount of torque the 4cyl puts out. The rear end in it now says 243 on it and has a gear ratio of 3.73 I was wondering what … read more. Another 8.2-inch axle was built for B-O-P applications and is commonly found in earlier GM mid-size cars. The result is your gear ratio. Since my interest now includes 1954 and 1956 mechanics I closely reread this chart. Multiply that number by … I recently put a powerglide in a '66 truck that was originally a 3-speed. Multiply this number times two equals ratio. In my stock 80 LWB C10 350 3spd auto th350, the stock rear end is a 2.73 ratio. The ratio should be stamped on the ring gear also. 4th gen Camaro’s were available with 2.73, 3.23, and 3.42 axle ratios but the tire diameter on a 275/45/17 is 26.7 inches. A good hand held tuner or pro tune will get you 30 to 40 hp for a 6.0 respectively. Enter the tire size diameter and the target vehicle speed in MPH. So then if a three speed over drive tyranny replaces a standard three then it powers a 3.73 axle. Axle ratios can sometimes be obtained off transmission labels, but those are not necessarily accessible. GU6 Rear Axle- 3.42. How to choose the correct Ring & Pinion: Each ring and pinion gear set sold below is for replacement use only. For example, a 3.73 gear ratio requires 3.73 driveshaft rotations to turn your tires once around. The Chevy’s rear axle code contains information on the vehicle’s gear ratio, date of manufacture and the rear axle assembly plant. I have an 85 2.8 auto with the same RPO tag. GU5 Rear Axle -3.23 Ratio. Multiplying the 2.48 First gear by the 4.10 rear axle results in a final drive ratio of 10.16:1 (2.48 x 4.10 = 10.16). Charts showing rear axles offered and gear ratios. It was a 6 cyl. General Motors rear end differentials are referred to by the diameter of the ring gear, i.e. Heavy-duty leaf springs and staggered shocks were used in the rear to prevent axle hop. Been down this road. The axle gears are a part of the differential, and are located behind the inspection cover on your axle. It is controlled by the number of teeth on the ring vs. the pinion. Calculate Rear End Gear Ratio Needed. Click on Calculate. How to tell what gear ratio is in your car without taking anything apart!! How to use the chart. Manual Transmission Gear Ratio Charts for GM/Chevy Vehicles Posted by OnAllCylinders Staff on October 27, 2017 at 12:44 pm Gear ratio affects a variety of driveline combinations, so it’s important to know what the gear ratios are for a gearbox you might be swapping into your ride. For Example: 235/45ZR-17 (235 x 0.45 x 2 ÷ 25.4) + 17 = 25.327" And here's a formula that you can use to calculate your vehicle's rear axle gear ratio: RING GEAR TOOTH COUNT ÷ PINION GEAR TOOTH COUNT = GEAR RATIO. damn near every s10 with the 4cyl and auto tranny has … H-Body Rear Axle Chart All information and graphics on this site is copyright Bob Gumm's "Building the V8 H-Body", 1999.

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