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Home >> Chevrolet >> 1990 >> Step Van 7.4 N, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Drive Axle - 7.5", 7.625", 8.5" & 9.5") >> Removal & Installation >> Pinion Flange & Seal >> Removal

Pinion Flange & Seal: Removal

WARNING: This page does not describe the selected car, but rather 20 other vehicles, including the 1990 GMC Vandura Special, 1990 GMC Vandura, 1990 GMC Safari, 1990 GMC S15 Pickup, and 1990 GMC S15 Jimmy. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise vehicle and allow axle assembly to hang free. Disconnect universal joint and secure bearing caps. Tie drive shaft out of way.
  2. Rotate pinion shaft through several revolutions using an INCH lb. torque wrench. Note and record pinion bearing preload. Mark relationship of pinion flange and shaft for reassembly. Count number of exposed threads on pinion shaft.
  3. Hold flange with Companion Flange Holder (J-8614-01) and remove self-locking nut. Using Pinion Flange Remover (J-8614-1, 2 and 3 for 7 1/2" and 7 5/8", and J-8614-01 for 8 1/2" and 9 1/2" ring gear), remove pinion flange. Pry pinion seal from housing.
NOTE: Be careful not to damage differential carrier when removing pinion seal.
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