Ford F150 Pickup. Manual — part 651
Fig. 42: Identifying Correct Pinion Position Shim That Requires A Decrease In Backlash
Courtesy of FORD MOTOR CO.
Correct pinion position shim that requires an increase in backlash.
Fig. 43: Identifying Correct Pinion Position Shim That Requires An Increase In Backlash
Courtesy of FORD MOTOR CO.
GENERAL PROCEDURES
DRIVELINE ANGLE INSPECTION
2003 Ford Pickup F150
2003 GENERAL INFORMATION Driveline System - General Information - F150 Pickup
Special Tool(s)
Fig. 44: Identifying Special Tool(s)
Courtesy of FORD MOTOR CO.
1. Check the vehicle for evidence of overload or sagging. Check for specified air pressures in all four tires.
2. Normalize the suspension.
3. Drive the vehicle onto a drive-on hoist or back onto a front-end alignment rack.
4. Inspect the suspension and chassis. Verify that the vehicle curb position ride height is within
specification.
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Measure the curb position ride height with the vehicle empty and all fluids full.
5. Place the inclinometer on a clean, flat level section on the bottom of the frame rail. Press the ALT ZERO
button to calibrate the inclinometer to the vehicle.
NOTE:
An incorrect driveline angle can cause a vibration or shudder. Refer to NOISE,
VIBRATION & HARSHNESS - F150 PICKUP .
2003 Ford Pickup F150
2003 GENERAL INFORMATION Driveline System - General Information - F150 Pickup
Fig. 45: Placing Inclinometer On A Clean Flat Level Section On Bottom Of Frame Rail
Courtesy of FORD MOTOR CO.
6. For the driveshaft angle reading, place the inclinometer flush against the bottom of the driveshaft. Check
and record the reading. Compare the results with the correct angles. Refer to SPECIFICATIONS .
2003 Ford Pickup F150
2003 GENERAL INFORMATION Driveline System - General Information - F150 Pickup
Fig. 46: Comparing Results With Correct Angles
Courtesy of FORD MOTOR CO.
7. To check the pinion angle, rotate the driveshaft so that the rear axle pinion flange yoke ear is parallel to
the floor. Remove the U-joint snap ring, then install the special tool. Check and record the pinion angle
reading.
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If the angle is not within specifications, repair or adjust to obtain the correct angles. Inspect the rear
suspension, rear axle, rear axle mounting or the frame for wear or damage.
2003 Ford Pickup F150
2003 GENERAL INFORMATION Driveline System - General Information - F150 Pickup
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