Ford F150 Pickup. Manual - part 518

Fig. 53: Removing Rear Axle Drive Pinion Seal 
Courtesy of FORD MOTOR CO. 

Installation 

 

2003 Ford Pickup F150 

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 10.25-inch - F150 Pickup

  

1. Lubricate the lips of the new pinion seal with grease. 

Fig. 54: Installing Rear Axle Drive Pinion Seal 
Courtesy of FORD MOTOR CO. 

2. Using the special tool, install the rear axle drive pinion seal.  

3. Install the rear axle pinion flange. For additional information, refer to DRIVE PINION FLANGE .  

DIFFERENTIAL HOUSING COVER 

Material 

CAUTION: If the rear axle drive pinion seal becomes misaligned during 

installation, remove it and install a new seal.

 

2003 Ford Pickup F150 

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 10.25-inch - F150 Pickup

  

Fig. 55: Material Specifications Table 
Courtesy of FORD MOTOR CO. 

Removal 

1. Raise and support the vehicle. For additional information, refer to WHEELS & TIRES .  

2. Remove the differential housing cover (4033).  

1. Remove the 12 differential housing cover bolts, and drain the lubricant from the rear axle housing (4010). 

2. Remove the differential housing cover. 

 

2003 Ford Pickup F150 

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 10.25-inch - F150 Pickup

  

Fig. 56: Removing Differential Housing Cover 
Courtesy of FORD MOTOR CO. 

Installation 

1. Clean the gasket mating surface of the rear axle and the differential housing cover.  

2. Apply a new, continuous bead of silicone sealant to the differential housing cover. 

CAUTION: Make sure the machined surfaces on both the rear axle housing and 

the differential housing cover are clean and free of oil before 
applying the new silicone sealant. The inside of the rear axle (4001) 
must be covered when cleaning the machined surface to prevent 
contamination.

 

2003 Ford Pickup F150 

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 10.25-inch - F150 Pickup