Fulltext TSBs

Technical Service Bulletins

TSB
07-7-2
  • REAR OF VEHICLE IS TOO HIGH/LOW – 5TH WHEEL AND GOOSE NECK APPLICATIONS – 4X4 VEHICLES ONLY
Publication Date: March 26, 2007

FORD:
2005-2008 F-Super Duty

ISSUE:

Some 2005-2008 F-Super Duty vehicles my exhibit a clearance concern when using the vehicle to tow some goose neck and 5th wheel trailer applications.

ACTION:

Follow the Service Procedure steps to change the rear ride height.

SERVICE PROCEDURE

Rear ride height may be reduced or increased by:

  • Lower – vehicles that have the 4″ (10 cm) spacer block by installing a new 2″ (5 cm) spacer block along with the other rear suspension hardware
  • Raise – vehicles that are perceived as riding too low (no spacer block installed) by installing a new 2″ (5 cm) spacer block along with other rear suspension hardware

LOWER VEHICLES WITH 4″ (10 cm) SPACER IN PLACE

  1. Raise vehicle on hoist and support rear axle.
  2. Remove rear axle U-bolts and nuts.
  3. Lower rear axle and remove 4X4 rear axle spacer blocks.
  4. Place new spacer blocks (Figure 1) on axle and raise axle to bottom of springs, seating springs in axle seat.
  5. Install new rear axle U-bolts and nuts (Figure 1). Torque nuts to 185 ± 28 lb-ft (250 ± 38 N-m).
  6. Remove rear axle shock absorber bolts and nuts, and remove rear shock absorbers.

    CAUTION:DO NOT OVER TORQUE SHOCK ATTACHING FASTENERS.

  7. Install new rear shock absorbers (refer to Figure 4 and 5 for correct application). Torque both upper and lower shock nuts to 62.5 ± 9.5 N-m (46 ± 7 lb-ft).

    NOTE:FAILURE TO UPDATE THE CENTER BEARING BRACKET (FIGURE 2 AND 3), IF REQUIRED, MAY RESULT IN DRIVELINE SHUDDER.

  8. If necessary, install new center bearing and/or shim (refer to Figure 2 and 3 for correct application) assembly as required.
  9. For checking driveline angles, refer to the Workshop Manual (WSM), Section 205-00.
  10. Adjust headlamp aim by referring to the WSM, Section 417-01.

RAISE VEHICLES WITHOUT 4″ (10 CM) SPACER

  1. Raise vehicle on hoist and support rear axle.
  2. Remove rear axle U-bolts and nuts.
  3. Place new spacer blocks (Figure 1) on axle and raise axle to bottom of springs, seating springs in axle seat.
  4. Install new rear axle U-bolts and nuts (Figure 1). Torque nuts to185 ± 28 lb-ft (250 ± 38 N-m).
  5. Remove rear axle shock absorber bolts and nuts, and remove rear shock absorbers.

    CAUTION:DO NOT OVER TORQUE SHOCK ATTACHING FASTENERS.

  6. Install new rear shock absorbers (refer to Figure 4 and 5 for correct application). Torque both upper and lower shock nuts to 62.5 ± 9.5 N-m (46 ± 7 lb-ft).
  7. Replace rear axle brake jounce hose assembly with new assembly, refer to the WSM, Section 206-00.
  8. If vehicle is equipped with a rear suspension stabilizer bar, replace rear stabilizer bar links with new stabilizer bar links. Torque stabilizer link nuts to 70 ± 15 N-m (52 ± 11 lb-ft).
  9. Bleed rear brake system by referring to the WSM, Section 206-00.

    NOTE:FAILURE TO UPDATE THE CENTER BEARING BRACKET (FIGURE 2 AND 3), IF REQUIRED, MAY RESULT IN DRIVELINE SHUDDER.

  10. If necessary, install new center bearing and/or shim (refer to Figure 2 and 3 for correct application) assembly as required.
  11. For checking driveline angles, refer to WSM, Section 205-00.
  12. Adjust headlamp aim by referring to the WSM, Section 417-01.

    NOTE:RIDE HEIGHT ISSUES RELATED TO A CUSTOMER'S TRAILER ARE NOT COVERED UNDER WARRANTY.


PART NUMBERPART NAME
F81Z-5K484-CAStabilizer Bar Links (2 Required)
5C3Z-2282-AABrake Jounce Hose Asy

WARRANTY STATUS:

Information Only – Not Warrantable




Figure 1 – Article 07-7-2




Figure 2 – Article 07-7-2




Figure 3 – Article 07-7-2




Figure 4 – Article 07-7-2




Figure 5 – Article 07-7-2