Fulltext TSBs

Technical Service Bulletins

TSB
08-11-1
  • INTERMITTENT VEHICLE VIBRATION – PARKING BRAKE DISENGAGEMENT CONCERNS
Publication Date: May 14, 2008

FORD:
2004-2008 F-150, F-150
LINCOLN:
2006-2008 Mark LT

This article supersedes TSB 08-4-18 to update the Part List.

ISSUE:

Some 2004-2008 F-150 (excludes Heritage) and 2006-2008 Mark LT vehicles may exhibit an intermittent vibration or shudder from the rear of the vehicle typically at speeds 45 MPH (72 Km/h) and higher. This may be caused by the parking brake remaining partially engaged. Affected vehicles were produced at: Dearborn Truck Plant before 2/13/2008, Kansas City Assembly Plant before 2/18/2008 and all 2004-2007 vehicles produced at Norfolk Assembly Plant.

ACTION:

Inspect the parking brake assembly for evidence of remaining partially engaged and repair using the following service procedure.

SERVICE PROCEDURE

  1. Raise the vehicle and remove the right hand (RH) and left hand (LH) rear brake rotors. Refer to Workshop Manual (WSM), Sections 206-00 for 2004 and 206-04 for 2005-2008.
  2. Inspect the parking brake shoes and parking brake drum for signs of engagement while driving (excessive discoloring and wear). If the parking brake system does not indicate signs of trouble, this is not the cause of the vibration. Do not continue with this TSB. Refer to the appropriate WSM, Section 100-04 for NVH diagnosis.

2004-2005 Model Year Vehicles

  1. Replace both the RH and LH parking brake actuator levers and replace the parking brake cable assembly on the affected side of the vehicle only. Refer to WSM, Section 206-00 for 2004, Section 206-05 for 2005. Refer to parts list to determine the correct cable assembly.
  2. Correctly position the parking brake cable equalizer to ensure the LH and RH parking brake cables do not twist or bind during operation. (Figure 1 – LH side)


    Figure 1 – Article 08-11-1

  3. Inspect the double cable clamp for debris and/or damage. Replace as required.
  4. Use a shop towel to clean the sheathing on both parking brake cables where the double cable clamp will be positioned. (Figure 2 – LH side)


    Figure 2 – Article 08-11-1

  5. Spray an even coat of Motorcraft® Silicone Spray Lubricant or equivalent, on the sheathing of both parking brake cables where the double cable clamp will be positioned. (Figure 2)

    NOTE:CORRECT PARKING BRAKE SHOE ADJUSTMENT DIMENSION IS 0.027″ (0.71 mm).

2006-2008 Model Year Vehicles

  1. Replace the parking brake cable assembly on the affected side of the vehicle only. Refer to WSM, section 206-05.
  2. Correctly position the parking brake cable equalizer to ensure the LH and RH parking brake cables do not twist or bind during operation. (Figure 1)
  3. Inspect the double cable clamp for debris and/or damage. Replace as required.
  4. Use a shop towel to clean the sheathing on both parking brake cables where the double cable clamp will be positioned. (Figure 2)
  5. Spray an even coat of silicone spray, Motorcraft® Silicone Spray Lubricant or equivalent, on the sheathing of both parking brake cables where the double cable clamp will be positioned. (Figure 2)

    NOTE:CORRECT PARKING BRAKE SHOE ADJUSTMENT DIMENSION IS 0.027″ (0.71 mm).


PART NUMBERPART NAME
8L3Z-2A635-GAPark Brake Cable RH (126″ Wheelbase)
8L3Z-2A635-HA Park Brake Cable RH (133″ Wheelbase)
8L3Z-2A635-JA Park Brake Cable RH (139″ Wheelbase)
8L3Z-2A635-KA Park Brake Cable RH (145″ Wheelbase)
8L3Z-2A635-LA Park Brake Cable RH (150″ Wheelbase)
8L3Z-2A635-MA Park Brake Cable RH (163″ Wheelbase)
8L3Z-2A635-AA Park Brake Cable LH (06-08 F-150 / 06-08 Mark LT Built After 8/26/2005)
W710010-S300 Clip – Park Brake Cable
5L3Z-2A635-LPark Brake Cable LH (04-05 LH / 2006 Mark LT Built Beforer 8/26/2005)
6L3Z-2A637-ARActuator – RH
6L3Z-2A637-ALActuator – LH
XL-6Motorcraft® Silicone Spray Lubricant

WARRANTY STATUS:

Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.

OPERATIONDESCRIPTIONTIME
081101A2004-2005 F-150: Replace Both Parking Brake Actuators, And One Parking Brake Cable Assembly, Includes Time For Inspection, Cleaning And Lubricating (Do Not Use With 2635A, 2001B, 2001B5, 2001B10)1.4 Hrs.
081101B2004-2005 F-150: Replace Both Parking Brake Actuators, And Both Parking Brake Cable Assemblies, Includes Time For Inspections, Cleaning And Lubricating (Do Not Use With 2635A, 2001B, 2001B5, 2001B10)1.5 Hrs.
081101C2006-2008 F-150/Mark LT: Replace One Parking Brake Cable Assembly, Includes Time For Inspection, Cleaning And Lubricating (Do Not Use With 2635A, 2001B, 2001B5, 2001B10)1.1 Hrs.
081101D2006-2008 F-150/Mark LT: Replace Both Parking Brake Cable Assemblies, Includes Time For Inspection, Cleaning And Lubricating (Do Not Use With 2635A, 2001B, 2001B5, 2001B10)1.2 Hrs.

DEALER CODING

BASIC PART NO.CONDITION CODE
2A63542