Differential: Adjustments
DRIVE PINION HEIGHT ADJUSTMENTNOTE: If the drive pinion and ring gear are replaced (always as a set), the height has to be adjusted.
Select the proper shim as follows:
First, calculate the difference in size between the old shim and the new pinion. The last one of the numbers on each pinion is the plus (+) or minus (-) tolerance in thousands of a millimeter. So, a pinion with +20 is 0.02 mm larger and a pinion with - 20 is 0.02 mm smaller.
1. If the number on the old pinion is a plus (+), add it to the old shim thickness. If it is a minus (-), subtract it from the old shim thickness.
2. If the number on the new pinion is a plus (+), subtract it from the number you got in step 1. If it is a minus (-), add it to the step 1 number.
3. Select the shim that is closest (but not more than) the final number you got from steps 1 and 2.
- Example 1:
Old shim: 2.00 mm thickness
Old pinion: +20(0.02 mm)
New pinion: -10 (-0.01 mm)
2.00 + 0.02 + 0.01 = 2.03
Select the 2.03 mm (0.0799 inch) new shim.
- Example 2:
Old shim: 1.70 mm thickness
Old pinion: -10 (-0.01 mm)
New pinion: -20(-0.02 mm)
1.70 -0.01 + 0.02 = 1.71
Select the 1.70 mm (0.0669 inch) new shim.