Chrysler Vehicle User Manual page 158

TJ
DIFFERENTIAL (Continued)
Fig. 41 BEARING CAP REFERENCE
1 - REFERENCE LETTERS
2 - REFERENCE LETTERS
(11) Apply a 6.35mm (1/4 in.) bead of red Mopar
Silicone Rubber Sealant or equivalent to the housing
cover (Fig. 42).
Fig. 42 DIFFERENTIAL COVER
1 - SEALANT SURFACE
2 - SEALANT
3 - SEALANT THICKNESS
CAUTION: If housing cover is not installed within 3
to 5 minutes, the cover must be cleaned and new
RTV applied or adhesion quality will be compro-
mised.
REAR AXLE - 194RBI
(12) Install the cover and any identification tag.
Tighten the cover bolts in a criss-cross pattern to 41
N·m (30 ft. lbs.).
(13) Refill the differential with Mopar Hypoid
Gear Lubricant or equivalent to bottom of the fill
plug hole.
(14) Install the fill hole plug.
DIFFERENTIAL - TRAC-LOK
DESCRIPTION
The Trac-Lok differential has a one-piece differen-
tial case, and similar internal components as a stan-
dard differential, plus
Differential bearing preload and ring gear backlash
are adjusted with shims located between the differ-
ential case bearing cups and housing. Pinion bearing
preload is set and maintained by the use of a collaps-
ible spacer.
OPERATION
This differentials clutches are engaged by two con-
current forces. The first being the preload force
exerted through Belleville spring washers within the
clutch packs. The second is the separating forces gen-
erated by the side gears as torque is applied through
the ring gear (Fig. 43).
This design provides the differential action needed
for turning corners and for driving straight ahead
during periods of unequal traction. When one wheel
looses traction, the clutch packs transfer additional
torque to the wheel having the most traction. This
differential resist wheel spin on bumpy roads and
provide more pulling power when one wheel looses
traction. Pulling power is provided continuously until
both wheels loose traction. If both wheels slip due to
unequal traction, Trac-lok
extreme cases of differences of traction, the wheel
with the least traction may spin.
DIAGNOSIS AND TESTING
The most common problem is a chatter noise when
turning corners. Before removing the unit for repair,
drain, flush and refill the axle with the specified
lubricant. A container of Mopar Trac-lok Lubricant
(friction modifier) should be added after repair ser-
vice or during a lubricant change.
After changing the lubricant, drive the vehicle and
make 10 to 12 slow, figure-eight turns. This maneu-
ver will pump lubricant through the clutches. This
will correct the condition in most instances. If the
chatter persists, clutch damage could have occurred.
3 - 99
two clutch disc packs.
operation is normal. In