Pinpoint Test I : Vehicle Pulsates Or Shudders In A Straight Line (STRAIGHTLINE Driveline Wind Up): Notes
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle Pulsates Or Shudders In A Straight Line (Straightline Driveline Wind-Up)
Refer to Four Wheel Drive Systems for schematic and connector information.
Normal Operation
For the 4WD system to function correctly the tires and wheels must be the same size, be in good condition and the front and rear axle ratios must match.
Possible Sources
- Unequal tire inflation pressures
- Unmatched tire and wheel sizes
- Unequal amounts of tire wear
- Unmatched front and rear axle ratios