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Publication Date: March 16, 2007

2005-2007 F-Super Duty


Some 2005-2007 Super Duty vehicles equipped with a 6.0L diesel engine may exhibit a buck/jerk concern when pulling large/heavy goose neck trailers. For example pulling multiple horses, living quarters, or on board water tank. This concern occurs in tow/haul mode, typically between 35-60 MPH (56-97 Km/h), and requires an input for the buck/jerk to start. For example, the buck/jerk may start after a shift event, torque converter lock up, or hitting a bump in the road surface.

Once the buck/jerk starts, the drivers foot may not be held steady on the pedal assembly and the buck/jerk becomes worse. Releasing the accelerator pedal completely, or going to wide open throttle (WOT) typically will stop the buck/jerk. This concern does not occur when operating the vehicle in cruise control.


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