Frame Rail - Jeep Wrangler 1999 Electronic Service Manual

TJ
DIAGNOSIS AND TESTING (Continued)
ening the attaching nuts. If the noise persists,
inspect for damaged and worn bushings, and attach-
ing components. Repair as necessary if any of these
conditions exist.
A squeaking noise from the shock absorber may be
caused by the hydraulic valving and may be intermit-
tent. This condition is not repairable and the shock
absorber must be replaced.
The shock absorbers are not refillable or adjust-
able. If a malfunction occurs, the shock absorber
must be replaced. To test a shock absorber, hold it in
an upright position and force the piston in and out of
the cylinder four or five times. The action throughout
each stroke should be smooth and even.
The shock absorber bushings do not require any
type of lubrication. Do not attempt to stop bushing
noise by lubricating them. Grease and mineral oil-
base lubricants will deteriorate the bushing.
SERVICE PROCEDURES
LUBRICATION
Periodic lubrication of the suspension system is
required. Refer to Group 0, Lubrication And Mainte-
nance for the recommended maintenance schedule.
The following component must be lubricated:
• Track bar
REMOVAL AND INSTALLATION
SHOCK ABSORBER
REMOVAL
(1) Remove the nut, retainer and grommet from
the upper stud through engine compartment access
hole (Fig. 1).
(2) Remove the lower nuts and bolts from the axle
bracket and remove the shock absorber.
INSTALLATION
(1) Position the lower retainer and grommet on the
upper stud. Insert the shock absorber through the
shock bracket hole.
(2) Install the lower bolts and nuts. Tighten nuts
to 28 N·m (250 in. lbs.).
(3) Install the upper grommet and retainer on the
stud and install the nut and tighten to 23 N·m (17 ft.
lbs.).
COIL SPRING
REMOVAL
(1) Raise and support the vehicle. Position a
hydraulic jack under the axle to support it.
Fig. 1 Coil Spring & Shock Absorber
(2) Paint or scribe alignment marks on the cam
adjusters and axle bracket for installation reference.
(3) Mark and disconnect the front propeller shaft
from the axle.
(4) Remove the lower suspension arm nut, cam
and cam bolt from the axle.
(5) Disconnect the stabilizer bar links and shock
absorbers from the axle.
(6) Disconnect the track bar from the frame rail
bracket.
(7) Disconnect the drag link from the pitman arm.
(8) Lower the axle until the spring is free from the
upper mount and remove the spring.
NOTE: Left coil spring has a retainer and bolt
which must be removed from the axle pad.
(9) Remove the jounce bumper if necessary from
the upper spring mount.
INSTALLATION
(1) Position the coil spring on the axle pad.
NOTE: Install retainer and bolt on the left spring
and tighten to 22 N·m (16 ft. lbs.).
(2) Install the jounce bumper.
(3) Raise the axle into position until the spring
seats in the upper mount, then raise another 51 mm
(2 in.).
(4) Connect the stabilizer bar links and shock
absorbers to the axle bracket. Connect the track bar
to the frame rail bracket.
(5) Install the lower suspension arm to the axle.
SUSPENSION 2 - 7