Chevrolet Silverado / GMC Sierra. Service manual — part 1373

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 and the outer pinion bearing cup and reposition the outer pinion
bearing cup. See Special Tools.

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 . See Special Tools.

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Front Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 189: Installing Inner Pinion Bearing Cup (9.25 Inch Axle)
Courtesy of GENERAL MOTORS CORP.

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.

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Front Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 190: Installing J 45754-1 Over The Outer Pinion Bearing Cup (9.25 Inch Axle)
Courtesy of GENERAL MOTORS CORP.

11. Install the J 45754-1 over the outer pinion bearing cup.

12. Attach the forcing screw to the J 45754-1.

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Front Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

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 and the inner pinion bearing cup and reposition the inner pinion bearing
cup. See Special Tools.

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 . See Special Tools.

16. Measure the pinion depth and determine the selectable pinion shim thickness. Refer to

Pinion Depth Adjustment.

FRONT DIFFERENTIAL DRIVE PINION GEAR BEARING CUP INSTALLATION (8.25 INCH
INCH AXLE W/J 45858)

Tools Required

J-45858 Pinion Bearing Race Remover/Installer - 8. See Special Tools.25 in Axle

Installation

1. Before assembly, lubricate the following parts with axle lubricant. Use the proper fluid.

Refer to Sealers, Adhesives, and Lubricants.

The pinion bearings

The pinion and the differential gears

The thrust washers

The pinion bearing cups

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Front Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado