Ford F150 Pickup. Instruction - part 602

Fig. 27: Removing Pinion Flange 
Courtesy of FORD MOTOR CO. 

Installation 

1. Lubricate the pinion flange splines. 

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Use SAE 75W-140 High Performance Rear Axle Lubricant F1TZ-19580-B or equivalent meeting 
Ford specification WSL-M2C192-A.  

NOTE:

Disregard the scribe marks if a new pinion flange is being installed.

 

2003 Ford Pickup F150 

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

  

Fig. 28: Aligning Pinion Flange With Drive Pinion Shaft 
Courtesy of FORD MOTOR CO. 

2. Align the pinion flange with the drive pinion shaft.  

3. With the drive pinion in place in the axle housing, install the pinion flange using the special tool. 

 

2003 Ford Pickup F150 

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

  

Fig. 29: Installing Pinion Flange 
Courtesy of FORD MOTOR CO. 

4. Position the new pinion nut. 

 

2003 Ford Pickup F150 

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

  

Fig. 30: Installing Pinion Nut 
Courtesy of FORD MOTOR CO. 

5. Using a suitable pinion flange holding tool to hold the pinion flange, tighten the pinion nut. 

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Rotate the pinion occasionally to make sure the cone and roller bearings are seating correctly.  

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Install a Nm (inch-pound) torque wrench on the pinion nut.  

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Rotating the pinion through several revolutions, take frequent cone and roller bearing torque 
preload readings until the original recorded preload reading is obtained.  

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If the original recorded preload is lower than specifications, tighten to the appropriate specification 
for used bearings. If the preload is higher than specification, tighten the nut to the original reading 
as recorded. For additional information, refer to TORQUE SPECIFICATIONS . 

CAUTION: Under no circumstances is the pinion nut to be backed off to reduce 

preloads. If reduced preload is required, a new collapsible spacer 
and pinion nut must be installed.

CAUTION: The pinion flange holding tool must be removed before preload 

readings can be recorded.

 

2003 Ford Pickup F150 

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