Inspection Before Carrier Disassembly

Integral Carrier

Inspect the parking brake lever boot retainer (2405) assembly and drive pinion before they are removed from the rear axle housing (4010) . 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 differential ring gear and pinion (4209) assembly must be checked using the Pinion Depth Gauge T79P-4020-A which shows correct drive pinion bearing adjustment shim (4663) 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 housing cover (4033) . Refer to Section 05-02A (7.5-inch Ring Gear) or Section 05-02B (8.8-inch Ring Gear). 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 differential ring gear and pinion . Install the axle housing cover .





Ring Gear Runout Check

1. With the pinion removed, place differential case/gear subassembly with differential bearings (4221) and differential bearing cups (4222) in rear axle housing.
   
   
   
   
   
   
   
   

2. Install a 6.75 mm (0.265-inch) differential bearing shim (4067) on the LH side of subassembly.
   
   
   
   

3. Install the LH bearing cap finger-tight.
   
   
   
   

4. Install progressively larger differential bearing shims on the RH side until the largest differential bearing shim selected can be assembled with a slight drag feel.
   
   
   
   

5. Install the RH side bearing cap. Install bearing cap bolts. Tighten both RH and LH bolts to 95-115 Nm (70-85 lb-ft).

6. Rotate the assembly to ensure free rotation.

7. Check and note ring gear runout.
   
   
   
   

8. If the runout is within specification, refer to Section 05-02A (7.5-inch Ring Gear) or Section 05-02B (8.8-inch Ring Gear).