Rear Axle - 8 1/4: Gear-Pinion/Ring: Installation: Gear-Pinion/Ring

Fig 1: Rear Pinion Bearing Cup

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NOTE: A pinion depth shim/oil baffle is located under the rear pinion bearing. If ring and pinion gears are reused, the original pinion depth shim/oil baffle can be used. Refer to ADJUSTMENTS for Pinion Gear Depth to select the proper shim thickness if ring and pinion gear are replaced.

Install rear pinion bearing cup with Installer C-4308 (1) and Handle C-4171 (2).

Fig 2: Front Bearing Cup
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Install front pinion bearing cup with Installer D-130 (1) and Handle C-4171 (2).

Fig 3: Pinion Seal Installer
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Install pinion front bearing and oil slinger, if equipped.
Apply a light coating of gear lubricant on the lip of pinion seal and install seal with Installer C-4076-B (3) and Handle C-4735 (1).

Fig 4: Rear Pinion Bearing
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Place pinion depth shim on the pinion.
Install rear bearing (4) on pinion gear (3) and slinger if equipped, with Installer 6448A (2) and a press (1).

Fig 5: Collapsible Preload Spacer
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Install a new collapsible spacer (1) on pinion shaft (3) and install pinion in housing.

Fig 6: Pinion Seal Installer
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Install new pinion seal with Installer C-4076-B (3) and Handle C-4735 (1).

Fig 7: Identifying Holder 6719
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Install companion flange with Installer C-3718 and Holder 6719A.
Install flange washer and a new nut on the pinion. The convex side of the washer must face outward.
Holding flange with Holder 6719A (2) and tighten nut with torque wrench (3) to 285 N.m (210 ft. lbs.).
CAUTION: Never loosen pinion nut to decrease pinion rotating torque and never exceed specified preload torque. Failure to heed caution may result in damage.
Hold flange with Holder 6719A and slowly tighten the nut in 6.8 N.m (5 ft. lbs.) increments until pinion torque to rotating is achieved. Measure rotating torque frequently to avoid over crushing the spacer.

Fig 8: Pinion Rotation Torque
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Check pinion torque to rotating (1) with an inch pound torque wrench (2).
Pinion Torque To Rotating is:
1. Original Bearings: 1 to 2 N.m (10 to 20 in. lbs.).
2. New Bearings: 1 to 3.4 N.m (10 to 30 in. lbs.).
Fig 9: Ring Gear
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Install ring gear (3) on differential case (4) and start two ring gear bolts (2).
Invert differential case in the vise.
Install new ring gear bolts and alternately tighten to 122 N.m (90 ft. lbs.).
CAUTION: Never reuse the ring gear bolts. Failure to follow these instructions will result in damage.
Install differential in axle housing and verify gear mesh refer to ADJUSTMENTS .