Installation

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. Position Spreader W-129-B, utilizing some items from Adapter set 6987, with the tool dowel pins seated in the locating holes (Fig. 53). Install the holddown clamps and tighten the tool turnbuckle finger tight.
2. Install a Pilot Stud C-3288-B at the left side of the differential housing. Attach Dial Indicator C-3339 to pilot stud. Load the indicator plunger against the opposite side of the housing and zero the indicator.

CAUTION: Do not spread over 0.38 mm (0.015 inch). If the housing is over-spread, It could be distorted or damaged.

3. Spread the housing enough to install the case in the housing. Measure the distance with the dial indicator.
4. Remove the dial indicator.
5. Install differential case in the housing. Ensure that the differential bearing cups remain in position on the differential bearings and that the preload shims remain between the face of the bearing cup and the housing. Tap the differential case to ensure the bearings cups and shims are fully seated in the housing.

NOTE: When installing a Vari-Lok differential, the oil feed tube must be pointed to the bottom of the housing. If differential is installed with the oil feed tube pointed toward the top, the anti-rotation tabs will be damaged.





6. Install the bearing caps in their original locations (Fig. 54).
7. Loosely install differential bearing cap bolts.
8. Remove axle housing spreader.
9. Tighten the bearing cap bolts to 77 Nm (57 ft. lbs.).
10. Install the axle shafts.





11. Apply a 6.35 mm (1/4 inch) bead of Mopar(R) Silicone Rubber Sealant or equivalent to the housing cover (Fig. 55).
Install the housing cover within 5 minutes after applying the sealant.
12. Install the cover and any identification tag. Tighten the cover bolts in a criss-cross pattern to 41 Nm (30 ft. lbs.).
13. Refill the differential with Mopar(R) Hypoid Gear Lubricant or equivalent to bottom of the fill plug hole.
14. Install fill hole plug.
15. Remove support and lower the vehicle.