Auto Repairing 2004-2008 Ford F-150 Steering Wheel Vibration At 50 Mph (80 Km/H)
Issue some 2004-2008 f-150 and 2006-2008 mark lt vehicles (excluding f-150 heritage) may exhibit a vehicle/steering wheelvibration (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. 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 4×4 vehicles and directly to step 3 for 4×2 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 4×4 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 07-4-5 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 andmanually 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.
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