PRE INSTALLATION NOTE:
Control arm bushings are pre-lubed during initial assembly at Rubicon Express. As general maintenance the control arm bushings should be
lubed with a silicone base grease
as needed. Silicone base grease can be purchased at your local auto parts store.
The Super-flex joints are also pre-lubed during initial assembly at Rubicon Express. As general maintenance the super-flex joints should be
greased as needed and the outer spanner nut tightened on the joint. Any type of grease will work on the Super-flex joints. Spanner nut
tools are available through Rubicon Express (RE3771 & RE3772) if needed for tightening of the joints.
INSTALLATION OVERVIEW
The installation process can be broken down into the following tasks:
1. Removal of factory lower control arm mounts from uniframe.
2. Front 3- piece crossmember.
3. Rear 3- piece crossmember.
4. Control arms.
5. Bump stops and coils.
6. Track bars and sway bar links.
7. Brake lines and shocks.
8. Final detailing and adjustments.
Step 1 - Removal of factory lower control arm mounts on frame.
A. First, support vehicle by uniframe (preferably on a lift) and work on a stable level surface. Support axles with jack stands and
remove the following components; shocks, track bars, sway bar end links, coil springs, control arms, bump stops, front brake
hoses and exhaust from crossmember on back. It may be helpful to only disconnect axle end of brake hoses and pinch-off hoses
with vise grips to minimize fluid loss until new SS hoses are installed in Step 7. NOTE: Coil springs can be removed without
compressors if enough distance is generated between the axle and frame. If a lift is not being used, it may be easier to do this
one side at a time on one axle at a time.
CAUTION: If using coil spring compressors, use extreme care as they will be holding a lot of potential energy and can release
violently.
B. Cut off the (4) factory lower control arm mounts from the uniframe. Use extreme care as not to damage the uniframe, or cut into
existing brake, fuel, or electrical lines.
C. Grind rough areas smooth and repaint – refer to Photo 1 and 2 for typical front and rear bracket removal.
Photo 1
Photo 2
Step 2 - Front 3-piece crossmember
A. First, support transmission/transfer case and remove factory crossmember.
B. Refer to Photo 3 for exploded view of all pieces of one end of the complete crossmember. Loosely assemble the main 3-piece
crossmember with the four supplied 1/2” bolts. The three main pieces consist of the two “9-hole” uniframe plates and the
transmission/control arm mount cross piece. For ’93-’95 vehicles, loosely install the transmission mount to the crosspiece (’96-’98
bolts directly to cross piece). Loosely bolt assembly up into position with the four factory crossmember bolts – refer to photo 4.
Align uniframe plates so their nine holes can be transferred through the pinch welds along the inside of the uniframe rails and
tighten the four bolts to hold in position.
RI8300 Page 2 of 7
(1 pages)
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