Front Differential Drive Pinion Gear Bearing Cup Installation (9.25 Inch Axle w/J 45754)

Tools Required 

J-45754  Pinion Bearing Race Remover/Installer - 9.25 in Axle

1. Before assembly, lubricate the following parts with axle lubricant. Use the correct fluid. Refer to Adhesives, Fluids, Lubricants, and Sealers .
   • The pinion bearings
   • The pinion and the differential gears
   • The thrust washers
   • The pinion bearing cups
Fig 1: View Of Outer Pinion Bearing Cup & Bore
Courtesy of GENERAL MOTORS COMPANY
2. Install the outer pinion bearing cup into the outer pinion bearing cup bore.
Fig 2: Identifying J 45754-1 Over Outer Pinion Bearing Cup (9.25 Inch Axle)
Courtesy of GENERAL MOTORS COMPANY
3. Install the J-45754-1 over the outer pinion bearing cup.
Fig 3: View Of J 45754-2 & Inner Pinion Bearing Cup Bore (9.25 Inch Axle)
Courtesy of GENERAL MOTORS COMPANY
4. Install the forcing screw (1), the J-45754-2 (2) into the inner pinion bearing cup bore.
5. Attach the forcing screw to the J-45754-1.

   Slowly turn the forcing screw until the J-45754-1 is evenly seated over the outer pinion bearing cup bore and the J-45754-2 with the inner pinion bearing cup is evenly seated over the inner pinion bearing cup bore.

6. Turn the forcing screw clockwise slowly in order to draw the outer pinion bearing cup into the outer pinion bearing cup bore.

   Inspect the position of the outer pinion bearing cup as it is being drawn into the outer pinion bearing cup bore to ensure the bearing cup is being pulled straight into the pinion bearing cup bore. If the pinion bearing cup is not being pulled straight into the bearing cup bore, remove the J-45754  pinion bearing race remover/installer and the outer pinion bearing cup and reposition the outer pinion bearing cup.

7. Tighten the forcing screw until the outer pinion bearing cup is seated in the outer pinion bearing cup bore.
8. Remove the J-45754  pinion bearing race remover/installer.
Fig 4: Identifying Inner Pinion Bearing Cup (9.25 Inch Axle)
Courtesy of GENERAL MOTORS COMPANY
9. Install the inner pinion bearing cup onto the J-45754-2 (2) and the forcing screw (1).
10. Install the J-45754-2 (2), the forcing screw (1), and the inner pinion bearing cup into the pinion bearing cup bore.
Fig 5: Identifying J 45754-1 Over Outer Pinion Bearing Cup (9.25 Inch Axle)
Courtesy of GENERAL MOTORS COMPANY
11. Install the J-45754-1 over the outer pinion bearing cup.
12. Attach the forcing screw to the J-45754-1.

    Slowly turn the forcing screw until the J-45754-1 is evenly seated over the outer pinion bearing cup bore and the J 45754-1 with the inner pinion bearing cup is evenly seated over the inner pinion bearing cup bore.

13. Turn the forcing screw clockwise slowly in order to draw the inner pinion bearing cup into the inner pinion bearing cup bore.

    Inspect the position of the inner pinion bearing cup as it is being drawn into the inner pinion bearing cup bore to ensure the bearing cup is being pulled straight into the pinion bearing cup bore. If the pinion bearing cup is not being pulled straight into the bearing cup bore, remove the J-45754  pinion bearing race remover/installer and the inner pinion bearing cup and reposition the inner pinion bearing cup.

14. Tighten the forcing screw clockwise until the inner pinion bearing cup is seated in the inner pinion bearing cup bore.
15. Remove the J-45754  pinion bearing race remover/installer.
16. Measure the pinion depth and determine the selectable pinion shim thickness. Refer to Pinion Depth Adjustment (8.6, 9.25 Inch Axle) .