Ford F150 Pickup. Manual - part 619

Fig. 94: Tightening Bearing Cap Bolts 
Courtesy of FORD MOTOR CO. 

8. Rotate the differential case to make sure it rotates freely. 

 

2003 Ford Pickup F150 

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

  

Fig. 95: Rotating Differential Case 
Courtesy of FORD MOTOR CO. 

9. Using the special tool, measure differential ring gear backlash. 

z

If the backlash is within specification, go to Backlash within specification in this procedure. The 
specification shown in the illustration is the total allowable range. For the preferred range, refer to 
SPECIFICATIONS .  

z

If a zero backlash condition occurs, go to Zero backlash in this procedure.  

z

If the backlash is not within specification, go to Backlash not within specification in this procedure. 

 

2003 Ford Pickup F150 

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

  

Fig. 96: Measuring Differential Ring Gear Backlash 
Courtesy of FORD MOTOR CO. 

Zero Backlash 

10. If a zero backlash condition occurs, add a 0.50-mm (0.020-inch) shim to the RH side and subtract 0.50 

mm (0.020 inch) from the LH side to allow backlash indication. Check backlash. Repeat Step 9 . 

 

2003 Ford Pickup F150 

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

  

Fig. 97: Backlash Check & Specifications Table (1 Of 2) 
Courtesy of FORD MOTOR CO. 

 

2003 Ford Pickup F150 

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