Troubleshooting Vibrations
Acceleration Vibration: Caused by the pinion being too high in relation to the transfer case shaft output shaft. To correct, shorten the upper arms, if possible, to lower the pinion.
Deceleration Vibration: Caused by the pinion being too low in relation to the transfer case output shaft. To correct, lengthen the upper arms, is possible, to raise the pinion.
Slip Yoke Vibration: Caused by excessive wear on the transfer case slip yoke. Commonly occurs on lifted vehicles with more than 30,000 miles. To correct, install a slip yoke eliminator kit and replace the rear driveshaft.
Bump Steer: Caused by improper relationship of drag link and track bar. To correct, center axle again following the instructions supplied with the track bar. Next determine the neutral position of the steering wheel. Adjust the drag link to center the steering wheel.