User guide

PHOTO 5
RI5525 Page 3 of 3
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LIFT KIT TROUBLESHOOTING
REAR DRIVELINE:
Acceleration vibration:
Caused by the pinion being too high in relation
to the transfer case output shaft. On leaf sprung vehicles, install axle
shims to lower pinion accordingly.
Deceleration vibration:
Caused by the pinion being too low in relation
to the transfer case output shaft. On leaf sprung vehicles, install axle
shims to raise pinion accordingly.
Fixed yoke vibration:
Caused by excessive angle at the rear transfer
case yoke. Very common on vehicles with 2” or more of lift. Can
typically be cured with a transfer case drop kit and shims provided
(pinion adjustment may also be required- see acceleration and
deceleration vibration troubleshooting above). If this does not cure it, a
CV yoke and CV drive shaft may be require. Adjust pinion so it is 2
degrees below parallel with CV drive shaft (see acceleration and
deceleration vibration troubleshooting above). Note that transfer case
drop kits can usually be omitted when using a CV drive shaft.
BUMP STEER:
Caused by a steep drag link angle on CJ’s. Installing a drop pitman arm
may help.