Fulltext TSBs

Technical Service Bulletins

TSB
06-12-2
  • VEHICLE / STEERING WHEEL VIBRATION AT 50 MPH (80 KM/H) OR HIGHER – STEERING WHEEL NIBBLE AT 65 MPH (105 KM/H) OR HIGHER
Publication Date: May 31, 2006

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

This article supersedes TSB 04-25-7 to update the vehicle model years.

ISSUE:

Some 2004-2006 F-150 and 2006 Mark LT vehicles (excluding F-150 Heritage) may exhibit a vehicle / steering wheel vibration (not nibble) at 50 MPH (80 Km/h) or higher, or a steering wheel nibble (side-to-side or rotational oscillation) at 65 MPH (105 Km/h) or higher.

ACTION:

Follow the Service Procedure steps to correct the condition.

SERVICE PROCEDURE

Refer to the Diagnostic Overview (Figure 1). Based on the customer’s description of the concern, find the appropriate operating condition, probable cause, and repair action.

NOTE:IT IS CRITICAL TO IDENTIFY SPECIFIC VEHICLE SPEEDS AND OPERATING CONDITIONS WHEN THE VIBRATION OR NIBBLE IS OCCURRING, TO PROPERLY DIAGNOSE AND REPAIR THE ISSUE. TIRE AND DRIVELINE VIBRATION CAN FEEL SIMILAR. USE OF AN ELECTRONIC VIBRATION ANALYZER (EVA) OR VETRONIX VIBRATION ANALYZER IS RECOMMENDED TO CORRECTLY IDENTIFY VIBRATION SOURCES (ORDERS) AND FREQUENCY (HZ).

NOTE:NIBBLE CANNOT BE ELIMINATED WITHOUT ADDRESSING PROPER TIRE AND WHEEL BALANCE.




Figure 1 – Article 06-12-2

  1. Drive the vehicle at highway speeds for at least 20 miles (32 km) to eliminate flat spotting. Install an EVA or Vetronix vibration analyzer and have an assistant monitor and record the reading near the end of the 20 mile (32 km) drive and while at the peak of the vibration. Proceed to Step 2 for 4X4 vehicles and directly to Step 3 for 4X2 vehicles.

    NOTE:IF NOT DRIVEN TO REMOVE FLAT SPOTS, THE TIRE BALANCE AND ROAD FORCE MEASUREMENTS MAY BE INACCURATE.

    NOTE:IF THE VIBRATION GOES AWAY DURING THE 20 MILE DRIVE, THE CONCERN IS DUE TO TIRE FLAT SPOTTING WHICH IS A NORMAL TIRE CONDITION. NO FURTHER DIAGNOSIS OR REPAIRS SHOULD BE PERFORMED.

  2. Check the integrated wheel end (IWE) on 4X4 units. Raise the front of the vehicle (wheels off the ground), engine running, and vehicle in 2WD mode. The front half shafts should not turn when wheels are rotated by hand. If the IWE is functioning correctly proceed to Step 3. If not, refer to Workshop Manual (WSM), Section 308-07 to repair IWE first. Then proceed to Step 3.
  3. If road force measurement equipment (Hunter GSP9700/9712, or equivalent) is available, proceed to Step 4. If not, refer to TSB 05-26-24 for using a dial indicator to optimize tire / wheel run-out. After optimizing tire / wheel run-out, proceed to Step 6.

    NOTE:THE PROCEDURE IN THIS TSB IS FAR MORE EFFECTIVE WHEN USING ROAD FORCE MEASUREMENT EQUIPMENT. ONLY USE A STANDARD BALANCER AND MANUALLY CHECK RUN OUT WHEN ABSOLUTELY NECESSARY. THERE IS A WEBSITE AVAILABLE (WWW.GSP9700.COM) TO LOCATE THE NEAREST FACILITY THAT HAS THIS TYPE OF EQUIPMENT.

    NOTE:SUPPRESS ROUND OFF FUNCTION ON ROAD FORCE BALANCER TO ALLOW ACTUAL RESIDUALS TO BE DISPLAYED.

  4. Perform the road force measurement immediately after driving the vehicle. Remove the wheel cover and wheel assembly. Measure the road force variation of all four (4) tires. Measure and mark the tire HIGH road force variation point (R1H) on all four (4) tires prior to dismounting them from the road force measurement equipment. Balance as required to 0.35 oz. (10g) or less of imbalance (check both two-plane and static). If any wheel assembly measures more than the values listed in the chart below for R1H, refer to TSB 05-26-24 for tire / wheel run-out diagnostics. If a tire / wheel assembly can not be brought within the R1H values listed in the chart using TSB 05-26-24, replace the tire and re-check. If less than the values listed, proceed to Step 5.

    Tire TypeR1H
    P Metric Tires25 lbs.
    LT Tires35 lbs.

  5. Install the lowest R1H level tires on the front of the vehicle.
  6. Position all tire / wheel assemblies on the hubs with the high R1H point, or high tire centerline radial run out point, at the 12:00 position (Figure 2).

    NOTE:THE SPARE TIRE SHOULD NOT BE USED AS A REPLACEMENT TIRE.




    Figure 2 – Article 06-12-2

  7. Install the lug nuts and torque to 150 lb-ft (203 N-m).
  8. Using a flat feeler gauge, check the wheel hub-to-bore clearance to verify the largest gap is as close to the 6:00 position as possible (Figure 2). If the largest gap is not located near the 6:00 position remove the lug nuts and tire/wheel assembly, rotate the hub to a new position, and reinstall the tire wheel assembly again following Steps 6 and 7. Check again for the optimum 6:00 gap location. Road test vehicle to verify vehicle is corrected. If not corrected, proceed to Step 9.
  9. Perform the following based on remaining symptom:
    1. If vibration still exists at 50-60 MPH (80-97 Km/h) (9-11 Hz), condition may be due to vehicle sensitivity or road inputs. Obtain Frame Damper Kit and refer to the instruction sheet included in the kit for installation.
    2. B. If steering wheel nibble still exists at 65 MPH (105 Km/h) or higher (12-14 Hz), and the vehicle build date is prior to 8/20/2003, follow TSB 06-12-4 to determine if steering gear replacement is needed.

      NOTE:THE DAMPER KIT WILL NOT HELP A STEERING WHEEL NIBBLE CONDITION OR A DRIVELINE VIBRATION (25-45 HZ).


PART NUMBERPART NAME
4L3Z-5D008-AAFrame Damper Kit (MY 2004-2005)
6L3Z-5D008-BFrame Damper Kit (MY 2006)

OTHER APPLICABLE ARTICLES:

06-12-4,  05-26-24

WARRANTY STATUS:

Eligible Under Provisions Of New Vehicle Limited Warranty Coverage

OPERATIONDESCRIPTIONTIME
061202A2004-2006 F-150, 2006 Mark LT: Road Test 20 Miles (32 km) With NVH Tool, Recorded Frequency (Two Man Allowance) If Concern Is Solved, Return To Customer (Do Not Use With 1007D, 1007D2, 1007D3) 1.6 Hrs.
061202B2004-2006 F-150, 2006 Mark LT: Road Test 20 Miles (32 km) With NVH Tool, Recorded Frequency (Two Man Allowance), Inspect IWE, Balance 4 Tires, Measure Hubs, Re-Road Test (Do Not Use With 1007D, 1007D2, 1007D3) 2.8 Hrs.
061202C2004-2006 F-150, 2006 Mark LT: Road Test 20 Miles (32 km) With NVH Tool, Recorded Frequency (Two Man Allowance), Inspect IWE, Balance 4 Tires, Measure Hubs, Re-Road Test, Install Damper (Do Not Use With 1007D, 1007D2, 1007D3) 3.4 Hrs.
061202D2004-2006 F-150, 2006 Mark LT: Road Test 20 Miles (32 km) With NVH Tool, Recorded Frequency (Two Man Allowance), Inspect IWE, Balance 4 Tires, Re-Index 4 Tires, Balance 4 Tires, Measure Hubs, Re-Road Test (Do Not Use With 1007D, 1007D2, 1007D3)3.4 Hrs.
061202E2004-2006 F-150, 2006 Mark LT: Road Test 20 Miles (32 km) With NVH Tool, Recorded Frequency (Two Man Allowance), Inspect IWE, Balance 4 Tires, Re-Index 4 Tires, Balance 4 Tires, Measure Hubs, Re-Road Test Install Damper 4.0 Hrs.
061202F2004-2006 F-150, 2006 Mark LT: Road Test 20 Miles (32 km) With NVH Tool, Recorded Frequency (Two Man Allowance), Inspect IWE, Balance 4 Tires, Re-Index 4 Tires, Re-Balance 4 Tires, Replace 4 Tires, Balance 4 New Tires, Measure Hubs, Re-Road Test (Do Not Use With 1007D, 1007D2, 1007D3)4.3 Hrs.
061202G2004-2006 F-150, 2006 Mark LT: Road Test 20 Miles (32 km) With NVH Tool, Recorded Frequency (Two Man Allowance), Inspect IWE, Balance 4 Tires, Re-Index 4 Tires, Re-Balance 4 Tires, Replace 4 Tires, Balance 4 New Tires, Measure Hubs, Re-Road Test, Install Damper (Do Not Use With 1007D, 1007D2, 1007D3)4.6 Hrs.

DEALER CODING

BASIC PART NO.CONDITION CODE
5005 (Operation C, E)42
NPF (Operation A)82
TWC01 (Operation B, D, F, G)42

NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information that could assist in proper vehicle service. The procedures should not be performed by “do-it-yourselfers”. Do not assume that a condition described affects your car or truck. Contact a Ford, Lincoln, or Mercury dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article. The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supercede this information with updates. The most recent information is available through Ford Motor Company’s on-line technical resources.

Copyright © 2006 Ford Motor Company