User Manual

RE7123B Page 6 of 6
A. I nstall wheels, ve rify all coils are properly s eated shocks installed and lower the vehicle.
B. Check the front track bar for axle center, adjust as nece ssary.
C. Tighten all control arm and track bar rubber bushing hardware. Use factory specs where factory bolts are used.
D. Properly bleed brake lines per factory manual and check for leaks and a firm pedal.
E. Manuall y d isable the factory ESP system before the first test drive. ( Refer to owners manual for the disable procedur e) Note the
location of steeri ng wheel while driving in a straight line and any driveline vibrations.
F. Adjust drag link to center the steering wheel. NOTE: Centering the steering wheel is highly critical for proper ESP function.
Minimum factory caster and maximum factory toe-in is the recommended initial setting for alignment (see Troub l eshooting as
well).
G. Adjust upper control arms if necessary for proper front castor angle and rear pinion angle. NOTE: Shown below is a diag ram of
proper pinion angle for a CV style drive shaft (see Troubleshooting as well).
H. Retighten all bol ts after 50 miles a nd again after every off road excursion.
I. After all adjustments have been made, Rubicon Express recommends that your local Jeep d e alership “flash” the computer to
adjust for proper tire size and ESP control settings.
TROUBLESHOOTING
Rear driveline:
Acceleration vibration:
Caused by the pinion be i n g too high in relation to the transfer case outp ut shaft. Adjust up per control arm to low e r
pinion accordingly.
Deceleration vib ration:
Caused by the pinion be ing too low in relation to the transfer case output shaft. Adjust upper control arm to raise
pinion accordingly.
High speed wobble:
It is a condition w here front tires will shimmy after hitting a b um p. Avoid bias ply tir es and wheels with exces sive offset. Check for worn or
loose parts. In most cases a reduction of p ositive castor will eliminate this condition .