Ford F150 Pickup. Instruction - part 529

Fig. 95: Identifying Special Tool(s) (2 Of 2)
Courtesy of FORD MOTOR CO. 

Material 

Fig. 96: Material Specifications 
Courtesy of FORD MOTOR CO. 

Removal 

1. Remove the axle shafts. For additional information, refer to AXLE SHAFT-DISC BRAKE and AXLE 

SHAFT-DRUM BRAKE .  

2. Wipe the lubricant from the internal working parts, and visually inspect the parts for wear or damage.  

3. Rotate the differential case to see if there is any roughness which would indicate damaged bearings or 

gears. 

 

2003 Ford Pickup F150 

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

  

Fig. 97: Rotating Differential Case 
Courtesy of FORD MOTOR CO. 

NOTE:

There is a space between the anti-lock speed sensor ring and the ring gear 
for measuring ring gear backface runout.

 

2003 Ford Pickup F150 

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

  

Fig. 98: Inspecting Ring Gear Backlash & Ring Gear Backface Runout 
Courtesy of FORD MOTOR CO. 

4. Using the special tools, inspect ring gear backlash and ring gear backface runout. 

CAUTION: Mark the position of the bearing caps, as arrows may not be visible. 

The bearing caps must be installed in their identical locations and 
positions.

 

2003 Ford Pickup F150 

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

  

Fig. 99: Removing Bearing Caps 
Courtesy of FORD MOTOR CO. 

5. Loosen the differential case. 

1. Remove the bearing cap bolts.  

2. Remove the bearing caps.  

6. To simplify the installation, fabricate two differential case retaining straps from metal stock as shown. 

 

2003 Ford Pickup F150 

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