How to find the gear ratio on rear differential

Typically the stock ratio is on the build sheet or could be on a sticker on the door panel or glove compartment. Ring Gear Pinion Gear Ratio.

So an easy way to determine your actual gear ratio is to check the tag attached to the differential cover by the cover bolts.

How to find the gear ratio on rear differential. Ever wonder how to find the gear ratio for your rear differential. This will help you find your gear ratio on a Ford or GMCChevrolet Truck. First youre going to need to locate the manufacturers sticker on your truck with the code.

FIGURING REAREND GEAR RATIO Ring Pinion FORMULA. Engine RPM Cruise Tire Revolutions Per Mile Rear-end Gear Ratio EXAMPLE Without Overdrive. 1800 RPM 65693811 2731 EXAMPLE Without Overdrive.

2000 RPM 65693811 3041. EXAMPLE With Overdrive 30. 1800 RPM 65693811 2731 x 130 3541.

Differential Gear Ratio Calculator. Enter the number of teeth on your ring and pinion gear set to find the gear ratio. Ring Gear Pinion Gear Ratio.

How to Calculate the Rear Axle Gear Ratio. Slide a floor jack under the rear of the vehicle and raise it until the rear wheels are off the ground. Place jack stands under the rear axle.

Get the correct parts the first time for your Chevy rear end. So an easy way to determine your actual gear ratio is to check the tag attached to the differential cover by the cover bolts. On the tag there should be some numbering such as 354 or 373 either of those numbers will give you the stock axle ratio.

The number of driveshaft rotations will help you determine your rear axle ratio. For example if it turned 3 and a half times its a 3501 ratio. If it turned 4 and a quarter times its a 4251 ratio.

For better accuracy turn the wheel 20 times and divide by 2 for your rear axle ratio. If you are unsure whether you have a Posi Rear or not. G11 Transaxle 256 G44 Rear Axle 307 G72 Rear Axle 214 G75 Rear Axle 362 G82 Rear Axle 456 G84 Rear Axle 410 G90 Rear Axle 315 G91 Rear Axle HWY 308 G94 Rear Axle 331 G96 Rear Axle 355 G97 Rear Axle 273 GH0 Rear Axle 354 GH2 Rear Axle 229 GH3 Rear Axle 277 GH4 Rear Axle 292 GH7.

Identify the VDS section the fourth through eighth digits of the VIN. This section typically includes information such as the vehicle model engine size and body type. While not every vehicle manufacturer includes gearbox ratio information in the VDS this will be where the information is found if it was included.

Calculating a vehicles axle ratio involves counting the number of teeth on the pinion gear as well as the ring gear and dividing the ring gears teeth number by the number of pinion gear teeth. Luckily modern trucks come with a sticker on the outside of its differentials where you can easily find axle information. Rear End Gear Calculator.

Axle ratio or rear end gear ratio is calculated by dividing the number of teeth on the ring gear by the number of teeth on the pinion gear. Most differentials nowadays will have a sticker on the outside with axle ratio information. That way you dont have to take apart a differential and manually count the teeth on the gears just to calculate axle ratio.

Identify your GMC or Chevrolet rear end gear ratio by the RPO Codes usually located on the placard labeled Service Parts Identification inside the drivers door panel or glove box. Accurate identification using the GM RPO code assumes that the rear end has not been previously modified The prefix is usually F G or H when referring to Axle Identification. The RPM Calculator will give you an estimate of your engine RPM based on tire diameter and the gear ratio you select.

The Gear Ratio Calculator will determine the ratio of a gear set based on the number of teeth on the ring gear and teeth on the pinion gear. The easiest way to determine the gear ratio is to jack up the car safely and block one rear wheel so it cant rotate. Most British cars have open differentials where a spider gear causes the wheels to rotate opposite one another.

If you block one the other wheel spins twice as quickly. Typically the stock ratio is on the build sheet or could be on a sticker on the door panel or glove compartment. You can also find the gear ratio stamped into the differential cover or written on to it from the factory but these arent always visible and can be difficult to locate.