Ford F150 Pickup. Instruction — part 573

Courtesy of FORD MOTOR CO.

10. Position the special tool.

1. Rotate the differential case to ensure the differential bearings are correctly seated.

2. Install the special tool.

Fig. 89: Positioning Special Tool
Courtesy of FORD MOTOR CO.

11. Rotate the differential case and measure the differential case runout without the ring gear.

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If runout is less than specification, install a new ring gear and pinion. If runout exceeds
specification, the ring gear is true and the concern is due to either a damaged differential case or
differential bearings. Inspect the differential bearings. If the differential bearings are not damaged,
replace both the differential case and the differential bearings.

2003 Ford Pickup F150

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 8.8-Inch Ring Gear - F150 Pickup

Fig. 90: Measuring Differential Case Runout
Courtesy of FORD MOTOR CO.

12. Remove the differential case from the rear axle housing and remove the differential bearings using the

special tools.

2003 Ford Pickup F150

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 8.8-Inch Ring Gear - F150 Pickup

Fig. 91: Removing Differential Bearings
Courtesy of FORD MOTOR CO.

13. Using the special tool install the new differential bearings on the differential case.

2003 Ford Pickup F150

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 8.8-Inch Ring Gear - F150 Pickup

Fig. 92: Installing Differential Bearings
Courtesy of FORD MOTOR CO.

14. Install the differential case. Position the differential case assembly, including the bearing cups and shims

in the rear axle housing. Tighten bearing caps to specifications.

2003 Ford Pickup F150

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 8.8-Inch Ring Gear - F150 Pickup