Pinpoint Test G : Vehicle Pulsates Or Shudders In A Straight Line (STRAIGHTLINE Driveline Wind-Up): Notes
WARNING: This page is about a different car, the 2015 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Two Wheel Drive/Four Wheel Drive Systems for schematic and connector information.
Normal Operation
In order for the 4WD system to function correctly, 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 and wheel size
- Unequal amounts of tire wear
- Unmatched front and rear axle ratios