Ford F150 Pickup. Instruction — part 621

Fig. 102: Checking Backlash
Courtesy of FORD MOTOR CO.

Backlash Within Specification

15. Remove the bearing caps and bolts.

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To establish differential bearing preload, increase both left and right shim sizes by the specification
shown in the illustration.

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Using a special tool, make sure the differential bearing shims are fully seated and the assembly
turns freely.

2003 Ford Pickup F150

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 9.75-inch - F150 Pickup

Fig. 103: Seating Differential Bearing Shim
Courtesy of FORD MOTOR CO.

16. Install the bearing caps and bearing cap bolts.

2003 Ford Pickup F150

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 9.75-inch - F150 Pickup

Fig. 104: Tightening Bearing Cap Bolts
Courtesy of FORD MOTOR CO.

17. Using the special tool, verify the backlash.

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The specification shown in the illustration is the total allowable range. For the preferred range,
refer to SPECIFICATIONS .

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For further adjustments, Refer to DRIVELINE SYSTEM - GENERAL INFORMATION .

2003 Ford Pickup F150

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 9.75-inch - F150 Pickup

Fig. 105: Checking Backlash
Courtesy of FORD MOTOR CO.

18. Install the axle shafts. For additional information, refer to AXLE SHAFT .

19. Install the differential housing cover and tighten the differential housing cover bolts.

REMOVAL & INSTALLATION

AXLE HOUSING

Removal & Installation

1. Remove the axle shafts. For additional information, refer to AXLE SHAFT .

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Wire the calipers aside. Do not remove the brake lines from the calipers.

2. Mark the driveshaft flange and pinion flange for correct alignment during installation.

NOTE:

The differential housing cover must be installed within 15 minutes of
application of the silicone, or new sealant must be applied. If possible,
allow 1 hour before filling with lubricant to make sure the silicone sealant
has cured correctly.

2003 Ford Pickup F150

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 9.75-inch - F150 Pickup