Inspection Before Carrier Disassembly

Integral Carrier

Inspect the differential case assembly and drive pinion before they are removed from the carrier casting. These inspections can help find the cause of the trouble and determine the correction needed.

1. Wipe the lubricant from the internal working parts and visually inspect the parts for wear and/or damage.

2. Rotate the gears to see if there is any roughness which would indicate worn or damaged bearings or gears.

3. Check the ring gear teeth for signs of scoring, abnormal wear, nicks or chips.

4. Set up a dial indicator, and check ring gear backlash and ring gear backface runout.

5. Proper gearset assembly must be checked using the Pinion Depth Gauge T79P-4020-A which shows correct pinion shim required to ensure acceptable running condition.

Ring and Pinion Backlash Check

This indicates runout conditions that will not show up in other tests. Remove the axle cover. Refer to Section 05-02A or 05-02B depending on axle size. Measure ring gear backlash on 30 consecutive ring gear teeth using Dial Indicator with Bracketry TOOL-4201-C or equivalent. Note the variation between the high and low readings. If over 0.10mm (0.004 inch), replace the gearset. Install the axle cover plate.





Ring Gear Runout Check