Ford F150 Pickup. Instruction - part 550

Fig. 179: Inserting Special Tool Into Pinion Shaft Bore 
Courtesy of FORD MOTOR CO. 

12. Inserting the special tool into the pinion shaft bore, turn the differential case. This will cause the 

differential pinion gears to engage the differential side gears and "walk" into the differential case. Rotate 
the differential case until the pinion mating shaft holes are lined up exactly with the holes in the 
differential pinion gears.  

13. Loosen the forcing screw, and remove the step plate and nut from the side gear bores. Install the 

differential pinion shaft in the differential case. 

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Install a new differential pinion shaft lock bolt finger-tight. 

NOTE:

It will probably be necessary to loosen or tighten the forcing screw to 
allow the differential pinion gears and differential side gears to rotate.

 

2003 Ford Pickup F150 

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

  

Fig. 180: Installing Differential Pinion Shaft Lock Bolt 
Courtesy of FORD MOTOR CO. 

14. Replace the differential bearings, if removed. 

 

2003 Ford Pickup F150 

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

  

Fig. 181: Installing Differential Bearing 
Courtesy of FORD MOTOR CO. 

15. Install the ring gear and, if removed, a new anti-lock speed sensor ring on the differential case and tighten 

the retaining bolts. 

 

2003 Ford Pickup F150 

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

  

Fig. 182: Tightening Ring Gear Bolts 
Courtesy of FORD MOTOR CO. 

16. Install the differential case. For additional information, refer to DIFFERENTIAL CASE . 

 

2003 Ford Pickup F150 

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