Rough Country PERF663 - Manual (Page 16)

POST INSTALLATION
1. Rotate driveshaft and check for interference at differential yoke and u-joint. If necessary, lightly dress casting(s)
and/or U-joint tabs in order to eliminate binding.
2. Bleed brake lines and test brakes before driving. Check for leaks.
3. Have a qualified alignment center realign front end to factory specs. As a general rule you set caster to the mini-
mum of the factory spec and set toe-in to the maximum.
4. Install Warning to Driver decal on sun visor.
5. Adjust headlights to proper settings
6. Grease all control arms and periodically grease as required.
7. All components must be retightened after 500 miles, and every three thousand miles after installation.
8. The factory exhaust must be modified / rerouted to have adequate clearance on all fixed and moving compo-
nents.
9. A CV type driveshaft and slip yoke is recommended for the 4” kit and a necessity for the 6” kit to avoid drive shaft
vibration.
TROUBLESHOOTING TIPS
Problem: Driveline Vibrations
Possible Solution: Check all u-joints to insure that there is no wear on the existing hardware caps. Even a new
vehicle can cause vibrations in the angle on the U-joint is changed after being run for even a short period of time.
Possible Solution: The transfer case drop brackets must be installed with the 4” lift, if you do not plan to run a slip
yoke eliminator.
Problem: Your Jeep does not steer, or track correctly.
Possible Solution: The steering geometry is corrected when the pitman arm is installed. If the steering is short or
offset after installing the lift with the pitman arm, the alignment shop should adjust the linkages on the front axle to
line the steering geometry back.
Possible Solution: If you are experiencing bump steer or axle float after the alignment, you will need to check the
track bar to ensure that the tie rod end is not worn or damaged. This will allow the axle to float from side to side.
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 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. Make sure your tires are
balanced—we recommend they be “road force” balanced. 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.
Thank you for purchasing a Rough Country Suspension System.