Rubicon Express RE5505 User Manual
Page 2
29
Install rear springs into vehicle with double military wrap end
at the frame (ref photo 1). The center pins may come with
spacers installed for use w/ floating type degree shims. Be
sure pins don’t bottom out on axle tube whether using shims
or not- remove spacers as required. If using steel Rubicon
MFG’s shims, remove the spacers and replace with the
shims. These steel shims will require reaming to 3/8” for
3/8” pins.
30
Do not fully tighten spring eye or shackle bolts at this time.
31
If using, insert 2* wide shim between spring and spring pad
on axle. Thicker end of shim should be at front of vehicle
(pinion points up).
32
Install new u-bolts with old spring plates. Torque u-bolts to
65-80 ft/lbs, or u-bolt specs if supplied.
33
Install longer rear shocks.
34
Torque spring eye and shackle bolts to factory specs.
35
If using, install transfer case drop kit by supporting one side
of transfer case with floor jack. Remove hardware from one
side of cross member. Install spacers and new hardware.
Tighten to 55 ft/lbs. Repeat on opposite side.
36
Lower axle so that it is at full droop. Rotate the rear drive
shaft to insure the yokes do not bind. If yokes bind and
shims are installed properly, a slip yoke eliminator and CV
drive shaft are likely required.
37
Lower rear of vehicle.
38
Bleed brake system. Inspect all brake hoses and lines for
leaks, kinks or damage.
39
Grease all zerk fittings on new bushings.
40
Lengthen drag link to center steering wheel.
41
Recheck all bolts - use factory torque specs if not given.
Recheck after 50 miles and then after every off road
excursion.
42
Reminder: Do not reinstall the rear track bar; it will not be
reused.
< FRAME END (MILITARY WRAP) – PHOTO 1 – SHACKLE END >
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.
Slip yoke vibration: caused by excessive angle at the rear transfer case
slip yoke. Very common on vehicles with 2” or more of lift. The transfer
case drop kit and shims provided may be an acceptable temporary fix
(pinion adjustment may also be required- see acceleration and
deceleration vibration troubleshooting above). If this is not acceptable,
a slip yoke eliminator and CV drive shaft is likely required and highly
recommended. 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.
PHOTO 2
PHOTO 3
Note: transfer case drop kits can usually be omitted when using a CV
drive shaft.
BUMP STEER:
Caused by improper relationship of drag link and track bar. A drop
pitman arm matching the track bar bracket rise can help if this is a
problem.
RI5505 Page 2 of 2