Reaction Block Clearance Adjustment

1. Install the left side gear thrust washer, the clutch plates, and the side gear.
Bolt the parts into position.
2. Install the right side gear thrust washer and cam assembly.
Bolt the parts into position.
3. Measure the distance from the side gear face to the case half face.
3.1. The thickness of the straight edge must be subtracted from the reading.
3.2. Add the measurement of both sides together. This is the side gear spread.





4. Measure the thickness of the original reaction blocks and the reaction block thrust washers together.
5. If the combined reaction block and the thrust washer thickness is not 0.000 to 0.1524 mm (0.000 to 0.006 inch) less than the side gear spread, adjust the clearance using the following procedure:
^ Select a new reaction block thrust washer of the correct thickness in order to obtain 0.000 to 0.1524 mm (0.000 to 0.006 inch) clearance.
^ Reshim the left and/or the right clutch disc pack.
Maintain the side gear backlash.
^ Some of the older locking differentials had select fit reaction blocks without a between thrust washer. These models require replacing the reaction blocks with the correct thickness reaction block.