Ford F150 Pickup. Manual — part 633

8. Insert the special tool in the pinion shaft bore, and turn the differential case to "walk" the differential

pinion gears and differential pinion thrust washers out to the differential case windows.

9. Remove the differential pinion gears and differential pinion thrust washers.

Fig. 149: Removing Differential Pinion Gears & Thrust Washers
Courtesy of FORD MOTOR CO.

10. Remove the differential side gears and differential clutch packs (4947), and tag them RIGHT and LEFT

with the shim.

2003 Ford Pickup F150

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

Fig. 150: Removing Differential Side Gears & Clutch Packs
Courtesy of FORD MOTOR CO.

CAUTION: When separating the clutch plates and clutch discs, note the

sequence in which they are disassembled. They must be
reassembled in the same sequence.

CAUTION: Do not use acids or solvents when cleaning the differential clutch

pack. Wipe components with a clean, lint-free cloth only.

2003 Ford Pickup F150

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

Fig. 151: Separating Differential Clutch Discs & Clutch Plates
Courtesy of FORD MOTOR CO.

11. Separate the differential clutch discs and clutch plates for cleaning and inspection. Refer to the

2003 Ford Pickup F150

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

disassembled view of the limited slip differential case in the Description and Operation.

Assembly

1. Prelubricate each steel clutch plate and soak all friction plates with 118 ml (4 ounces) Additive Friction

Modifier C8AZ-19B546-A or equivalent meeting Ford specification EST-M2C118-A for at least 15
minutes.

Fig. 152: Identifying Belleville Spring
Courtesy of FORD MOTOR CO.

NOTE:

Do not mix the differential clutch packs or shims from one side with the
other.

NOTE:

The Belleville spring is a dished plate.

2003 Ford Pickup F150

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