Ford F150 Pickup. Instruction - part 590

2. Remove the two differential side gears.  

3. Remove the two differential pinion thrust washers.  

Fig. 157: Removing Differential Gears 
Courtesy of FORD MOTOR CO. 

CAUTION: Keep the differential clutch packs in order. Do not mix them. They 

must be reassembled in the same sequence.

 

2003 Ford Pickup F150 

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 8.8-Inch Ring Gear - F150 Pickup

  

Fig. 158: Removing Differential Clutch Packs & Differential Side Gears 
Courtesy of FORD MOTOR CO. 

9. Remove the differential clutch packs and differential side gears and tag them "right" and "left" with the 

 

2003 Ford Pickup F150 

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 8.8-Inch Ring Gear - F150 Pickup

  

shim. 

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Clean and inspect the remaining parts of the differential case for wear or damage and replace parts 
as necessary.  

10. Clean and inspect the differential clutch packs for wear and replace parts as necessary.  

Assembly 

Fig. 159: Prelubricating Steel Clutch Plate & Soaking Friction Plates 
Courtesy of FORD MOTOR CO. 

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

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

CAUTION: 118 ml (4 oz) of the specified Ford Friction Modifier must be used in 

the axle.

 

2003 Ford Pickup F150 

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 8.8-Inch Ring Gear - F150 Pickup

  

1. Prelubricate each steel clutch plate and soak all friction plates with friction modifier for at least 15 

minutes. 

CAUTION: Do not mix the differential clutch packs or shims from the one side 

with the other.

 

2003 Ford Pickup F150 

2003 DRIVELINE/AXLES Rear Drive Axle/Differential - Ford 8.8-Inch Ring Gear - F150 Pickup