Depth Gauge Check

1. Refer to the following tool usage chart for the correct tools for the particular axles. Tool T8OT-4020-A

NOTE: If any of the gauge surfaces become nicked, the high spots must be removed with a medium India oilstone to ensure no erroneous readings.




2. Place a new inner pinion bearing cone over the proper aligning adapter and insert into the axle carrier bore. Place the outer pinion bearing cone (new or used if in good condition) into the bearing cup and assemble the handle onto the screw and hand tighten. Note the 3/8 inch square drive in the handle to be used for obtaining the proper pinion bearing preload and tighten to preload of 2.26-4.53 Nm (20-40 in-lbs).

3. Center the proper gauge tube into the differential bearing bore. Install the bearing caps and tighten to 109-147 Nm (80-90 ft-lbs).

4. Using a feeler gauge tool or shims, select the thickest feeler shim that will enter between the gauge tube and the gauge block. Insert the feeler gauge directly along the gauge block to insure a correct reading. The feeler gauge fit between the gauge tube and the gauge block should be a slight drag-type feeling. Make sure the shims or feeler gauges are free of dirt to prevent an incorrect reading.

5. After the correct feeler gauge feel is obtained, check the reading and this is the thickness of shim(s) required providing that upon inspection of the service pinion gear, there are no markings.

NOTE: If the service pinion gear is marked with a plus + reading, this amount must be subtracted from the thickness dimension obtained in Step 4.

If the service pinion gear is marked with a minus - reading, this amount must be added to the thickness dimension obtained in Step 4.

In addition you must use the exact same new inner pinion bearing that was used in the previous steps.

6. Remove the inner pinion bearing cup and install the correct thickness of shims in the carrier bore. Re-install the bearing cup and oil slinger (if used) on the pinion and press on the bearing with T53T-4621-C, for Model 70, T75L-1165-DA for Model 60, or 080T-4200-B for Model 80.

NOTE: If a baffle or slinger is used, replace with a new one upon assembly and measure as part of the shim stack.

7. After following these procedures, continue to build the remaining components with proper pinion and differential bearing preload torques and ring gear backlash.