Installation - Tru-Lok

DIFFERENTIAL TRU LOK

INSTALLATION

NOTE: If replacement differential bearings or differential case are being installed, differential side bearing shim requirements may change. Refer Adjustments (Differential Bearing Preload and Gear Backlash) to determine the proper shim selection.

1. Install indicator switch into the housing.





2. Position Spreader W-129-B and adapters from Adapter set 6987, with the tool dowel pins seated in the locating holes (Fig. 76). Install hold-down clamps and tighten the tool turnbuckle finger-tight.
3. Install Pilot Stud C-3288-B at the left side of the differential housing. Attach Dial Indicator C-3339 to pilot stud. Load indicator plunger against the opposite side of the housing and zero indicator.
4. Spread housing while measuring the distance with the dial indicator.

CAUTION: Never spread over 0.38 mm (0.015 inch). Failure to heed caution may result in damage.

5. Remove dial indicator.
6. Install differential case with pinion gear side bearing cap and differential preload shims in the housing. Tap differential case to seat bearings cups in the housing.

CAUTION: Ensure indicator switch plunger head is positioned under the actuator. Failure to heed caution may result in damage.





7. Install ring gear side bearing cap with reference marks aligned (Fig. 77).
8. Loosely install differential bearing cap bolts.
9. Remove axle housing spreader.
10. Tighten bearing cap bolts to 108 Nm (80 ft. lbs.).
11. With a 1/4 inch drill bit check the clearance between the actuator and actuator pressure plate at the top and the bottom.

CAUTION: If clearance is not correct, indicator switch plunger may be on top of the actuator or actuator mounting tabs may be bent. Failure to heed caution may result in damage.

12. Install pressure hose on the actuator assembly.
13. Install axle shafts.





14. Install differential cover, identification tag and indicator switch connector (Fig. 78).