Rough Country PERF644 - Manual (Page 8)

Thank you for purchasing a Rough Country Suspension Lift Kit.
TROUBLESHOOTING TIPS
Problem: Driveline Vibrations
Possible Solution: Check all u-joints to insure that there is no wear on the existing hardware caps.
Possible Solution: Driveline vibrations can be caused from the removal or addition of the hardtop which changes the
rear vehicle weight, and the rear height, which affects the rear drive shaft pinion angle. Rough Country adjustable
upper control arms or upper rear cam bolts, will eliminate such vibrations by adjusting / rotating the rear pinion angle
up or down as needed.
Possible Solution: The transfer case drop spacers must be installed with the 3 1/4” lift, if you do not plan to run a
slip yoke eliminator.
Problem: You experience “High Speed Wobble” after hitting bump at 35-40mph.
Possible Solution: “Death wobble” is usually a combination of items and typically there are is not one easy fix. We
recommend you follow these steps when trying to identify source. Start by looking for any loose movement in the
steering. Watch the tie-rod ends where they connect to the steering knuckle arms. Watch the drag link and the ends.
Watch the track bar—it should remain tight without side to side movement when dry turning. Check to make sure your
wheel bearing are in good condition by jacking up Jeep and grabbing top of the wheel and try to rock it back and
forth. Make sure your tires are balanced—we recommend they be “road force” balanced. Is your front end in
alignment? Lack of proper caster angles may be the problem. Last but not least is the steering stabilizer. A new
stabilizer will not fix the problem, but a worn out one will make the situations worse. Most aftermarket stabilizers
significantly dampen the movement that is the precursor to death wobble—control this and the severity is limited.