Steering Shimmy Diagnostic/Repair Procedure for Alignment
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Frame rail at or near the leaf spring mounting brackets
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Front crossmember where the track bar mounting bracket mounts
Steering Gear
If shimmy has been experienced, replace the steering gear sector shaft with Repair Kit (F6AZ-3575-AA) as outlined in the appropriate
Service/Workshop Manual
Check the steering gear for presence of meshload. With the front wheels off the ground, hold the tire and turn the tire side-to-side slowly. The effort
should increase when turning the tire straight ahead. If no increase in effort is noted, perform the procedure as outlined in Section 11-02B of the
Service/Workshop Manual to check and adjust the meshload.
Ball Joints or Worn King Pins
For proper diagnosis and replacement of king pins and ball joints, refer to the Service/Workshop Manual, Section 04-00.
Wheel Bearing End Play
For proper diagnosis, adjustment, or replacement of the wheel bearing, refer to the Service/Workshop Manual, Sections 04-00 and 04-01A.
Alignment/Wheel/Tire Size and Balance
All alignment adjustments should be measured and set to the recommended specifications as stated in the Service/Workshop Manual, Section 04-00.
Compare tire size and wheel size with sizes and pressures on the certification label. Inflate to the specified pressure. Assure correct balance of the front
wheels.
Steering Damper
A Steering Damper Kit should be installed when shimmy is experienced. Install the following applicable Service Kit:
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F-250 HD/350 4X2 SRW and DRW vehicles - F7TZ-3E651-BA
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F-250 HD 4X4 (see template when installing kit) - F7TZ-3E650-CA
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F-350 4X4 SRW and DRW vehicles - E7TZ-3E651-C
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F-Super Duty Chassis Cab (F-47) - E8TZ-3E651-B