What should backlash?
At low power outputs, backlash results in inaccurate calculation from the small errors introduced at each change of direction; at large power outputs backlash sends shocks through the whole system and can damage teeth and other components. It should be less than 1/10th of module.
How do you find the backlash of gears?
As a rule of thumb the average backlash is defined as 0.04 divided by the diametral pitch; the minimum being 0.03 divided by the diametral pitch and the maximum 0.05 divided by the diametral pitch. In a gear train, backlash is cumulative.
How is backlash adjusted?
They work by tightening one side and loosening the other side to move the differential sideways. If your rear end does not use adjusters, then you need to adjust backlash by using shims. By placing various thickness shims on either side of the differential, you can adjust backlash.
How do you set backlash on rear gear?
Setting backlash is done using a dial indicator to measure the free movement of the ring gear. A typical set of gears comes with a marking compound. This compound is used to show what the pattern actually is on the ring gear while adjusting the backlash.
What is the correct way to set backlash?
Different backlash pattern markings—correct and incorrect. Setting backlash is done using a dial indicator to measure the free movement of the ring gear. A typical set of gears comes with a marking compound. This compound is used to show what the pattern actually is on the ring gear while adjusting the backlash.
Where is the backlash setting on a car?
Once the pinion depth is properly set, the backlash needs to be adjusted and set. Some rear ends use adjusters that are located next to the differential carrier bearings, and others are adjusted by adding/removing shims. Finding the proper backlash setting can be found in a service manual for the vehicle you are working on.
What should the backlash be on a GM 8.5 ” rear differential?
The 8.5” 10-bolt should have between .006 and .010” of backlash, we are not talking about much, and the only to check this is with a dial indicator. This is the basis for the rest of the install, so it needs to be checked first and it needs to be right.