stall JEEP GRAND CHEROKEE 2003 WJ / 2.G Owner's Manual

(10) Start the engine and re-check for vibration. If
there is little or no change in vibration, move the
clamp to one of the other three positions. Repeat the
vibration test.
(11) If there is no difference in vibration at the
other positions, the source of the vibration may not
be propeller shaft.
(12) If the vibration decreased, install a second
clamp (Fig. 2) and repeat the test.
(13) If the additional clamp causes an additional
vibration, separate the clamps (1/4 inch above and
below the mark). Repeat the vibration test (Fig. 3).
(14) Increase distance between the clamp screws
and repeat the test until the amount of vibration is
at the lowest level. Bend the slack end of the clamps
so the screws will not loosen.
(15) If the vibration remains unacceptable, apply
the same steps to the front end of the propeller shaft.
(16) Install the wheel and tires. Lower the vehicle.RUNOUT
(1) Remove dirt, rust, paint, and undercoating
from the propeller shaft surface where the dial indi-
cator will contact the shaft.
(2) The dial indicator must be installed perpendic-
ular to the shaft surface.
(3) Measure runout at the center and ends of the
shaft sufficiently far away from weld areas to ensure
that the effects of the weld process will not enter into
the measurements.
(4) Refer to Runout Specifications chart.
(5) If the propeller shaft runout is out of specifica-
tion, remove the propeller shaft, index the shaft 180É,
and re-install the propeller shaft. Measure shaft
runout again.
(6) If the propeller shaft runout is now within
specifications, mark the shaft and yokes for proper
orientation.
(7) If the propeller shaft runout is not within spec-
ifications, verify that the runout of the transmission/
transfer case and axle are within specifications.
Correct as necessary and re-measure propeller shaft
runout.
(8) Replace the propeller shaft if the runout still
exceeds the limits.
RUNOUT SPECIFICATIONS
Front of Shaft 0.020 in. (0.50 mm)
Center of Shaft 0.025 in. (0.63 mm)
Rear of Shaft 0.020 in. (0.50 mm)
note:
Measure front/rear runout approximately 3 inches (76
mm) from the weld seam at each end of the shaft
tube for tube lengths over 30 inches. For tube lengths
under 30 inches, the maximum allowed runout is
0.020 in. (0.50 mm) for the full length of the tube.
STANDARD PROCEDURES
This procedure applies to both the front propeller
shafts and the rear propeller shaft. To obtain the
front (output) angle on the C/V front propeller shaft,
the inclinometer is placed on the machined ring of
the pinion flange. To obtain the propeller shaft angle
measurement on the C/V front propeller shaft, the
inclinometer is placed on the propeller shaft tube.
PROPELLER SHAFT ANGLE
(1) Raise and support the vehicle at the axles as
level as possible. Allow the wheels and propeller
shaft to turn.
(2) Remove any external bearing snap rings from
universal joint if equipped, so the inclinometer base
will sits flat.
Fig. 2 TWO CLAMP SCREWS
Fig. 3 CLAMP SCREWS SEPARATED
1 - ó INCH
WJPROPELLER SHAFT 3 - 3
PROPELLER SHAFT (Continued)

PROPELLER SHAFT - FRONT
REMOVAL
NOTE: Different length propeller shafts are used for
different drivetrain applications. Ensure that the
correct propeller shaft is used.
(1) Place vehicle on floor or drive-on hoist with full
weight of vehicle on suspension.
(2) Shift the transmission and transfer case, if nec-
essary, into the Neutral position.
(3) Measure the distance from the face of the C/V
joint cup to the end of the C/V joint boot (Fig. 8).
(4) The correct length is 142.7 mm (5.61 in.).
NOTE: If the measurement is not correct, the wrong
shaft may have been installed or a mating compo-
nent (front axle or transfer case) may be installed
incorrectly. Investigate and correct as necessary.
(5) Mark a line across the companion flange at the
transfer case and C/V joint at the rear of the front
propeller shaft for installation reference.
(6) Mark a line across the C/V joints and the pin-
ion companion flanges for installation reference.
(7) Remove bolts from the front C/V joint to the
pinion companion flange.
(8) Remove bolts from the rear C/V joint to the
transfer case companion flange.
(9) Push the propeller shaft forward to clear trans-
fer case companion flange and remove the shaft.
INSTALLATION
NOTE: Different length propeller shafts are used for
different drivetrain applications. Ensure that the
correct propeller shaft is used.
(1) Install the shaft between companion flanges.
(2) The shaft should rotate freely in the pinion
flange.
(3) Align marks on the companion flanges with the
marks on the C/V joints.
(4) Install bolts to the front C/V joint and tighten
bolts to 32 N´m (24 ft. lbs.).
(5) Install the bolts to the rear C/V joint and
tighten bolts to 32 N´m (24 ft. lbs.).
(6) Verify propeller shaft length.
(7) Lower vehicle.
PROPELLER SHAFT - FRONT
4.7L
REMOVAL
(1) Raise and support vehicle.
(2) Remove crossmember/skid plate as necessary to
gain access to the propeller shaft.
(3) Shift transmission and transfer case, if neces-
sary into Neutral.
(4) Mark a line across the yoke at the transfer
case, link yoke and propeller shaft yoke at the rear of
the front propeller shaft for installation reference
(Fig. 9).
(5) Mark a line across the propeller shaft yoke and
pinion shaft yoke for installation reference.
Fig. 8 MEASUREMENT
1 - C/V JOINT CUP
2 - C/V BOOT END
3 - MEASUREMENT
Fig. 9 REFERENCE MARKS ON YOKES
1 - REFERENCE MARKS
3 - 6 PROPELLER SHAFTWJ

(6) Remove the U-joint strap bolts at the pinion
shaft yoke (Fig. 10).
(7) Remove bolts holding rear universal joint to
the transfer case yoke.
(8) Separate the rear universal joint from the
transfer case yoke.
(9) Push rear of propeller shaft upward to clear
transfer case yoke.
(10) Separate front universal joint from front axle.
(11) Separate propeller shaft from vehicle.
INSTALLATION
(1) Position front propeller shaft under vehicle
with rear universal joint over the transfer case yoke.
(2) Place front universal joint into the axle pinion
yoke.
(3) Align mark on the rear link yoke and universal
joint to the mark on the transfer case yoke.
(4) Loosely install bolts to hold universal joint to
transfer case yoke.
(5) Align mark on front universal joint to the mark
on the axle pinion yoke.
(6) Tighten the U-joint strap/clamp bolts at the
axle yoke to 19 N´m (14 ft. lbs.).
(7) Tighten the universal joint to transfer case
bolts to 27 N´m (20 ft. lbs.).
(8) Lower the vehicle.
PROPELLER SHAFT - REAR
REMOVAL
(1) Raise and support vehicle on safety stands.
(2) Shift the transmission and transfer case if nec-
essary, to their neutral positions.
(3) Mark a line across the axle pinion yoke and the
propeller shaft yoke for installation reference.
(4) Remove the bolts holding the universal joint
clamps to the pinion yoke.
(5) Slide the slip yoke off of the transmission, or
transfer case, output shaft and remove the propeller
shaft (Fig. 11).
INSTALLATION
(1) Slide the slip yoke on the transmission, or
transfer case, output shaft.
(2) Align the installation reference marks made on
the propeller shaft and pinion yoke.
(3) Position universal joint into pinion yoke.
(4) Install the universal joint clamp and clamp
bolts to the pinion yoke. Tighten bolts to 19 N´m (14
ft. lbs.).
(5) Lower the vehicle.
Fig. 10 FRONT PROPELLER SHAFT - 4.7L
1 - FRONT AXLE
2 - BOOT
3 - PROPELLER SHAFT
4 - DOUBLE CARDAN U-JOINT
5 - TRANSFER CASE
6 - BOOT
7 - SLINGER
8 - CLAMP
9 - YOKE
Fig. 11 REAR PROPELLER SHAFT
1 - SLIDING YOKE
2 - PROPELLER SHAFT
3 - PINION YOKE
4 - CLAMP/STRAP
5 - BOLT
6 - OUTPUT SHAFT
WJPROPELLER SHAFT 3 - 7
PROPELLER SHAFT - FRONT 4.7L (Continued)

SINGLE CARDAN UNIVERSAL
JOINTS
DISASSEMBLY
NOTE: Individual components of cardan universal
joints are not serviceable. If worn or leaking, they
must be replaced as an assembly.
(1) Remove the propeller shaft.
(2) Tap the outside of the bearing cap assembly
with a drift to loosen snap ring.
(3) Remove snap rings from both sides of yoke
(Fig. 12).
(4) Set the yoke in an arbor press or vise with a
socket whose inside diameter is large enough to
receive the bearing cap positioned beneath the yoke.
(5) Position the yoke with the grease fitting, if
equipped, pointing up.
(6) Place a socket with an outside diameter
smaller than the upper bearing cap on the upper
bearing cap and press the cap through the yoke to
release the lower bearing cap (Fig. 13).
(7) If the bearing cap will not pull out of the yoke
by hand after pressing, tap the yoke ear near the
bearing cap to dislodge the cap.
(8) To remove the opposite bearing cap, turn the
yoke over and straighten the cross in the open hole.
Then, carefully press the end of the cross until the
remaining bearing cap can be removed (Fig. 14).
CAUTION: If the cross or bearing cap are not
straight during installation, the bearing cap willscore the walls of the yoke bore and damage can
occur.
Fig. 12 REMOVE SNAP RING
1 - SNAP RING
Fig. 13 PRESS OUT BEARING
1 - PRESS
2 - SOCKET
Fig. 14 PRESS OUT REMAINING BEARING
1 - CROSS
2 - BEARING CAP
3 - 8 PROPELLER SHAFTWJ

ASSEMBLY
(1) Apply extreme pressure (EP) N.L.G.I. Grade 1
or 2 grease to inside of yoke bores.
(2) Position the cross in the yoke with its lube fit-
ting, if equipped, pointing up (Fig. 15).
(3) Place a bearing cap over the trunnion and
align the cap with the yoke bore (Fig. 16). Keep the
needle bearings upright in the bearing cap.
(4) Press the bearing cap into the yoke bore
enough to clear snap ring groove.
(5) Install a snap ring.
(6) Repeat Step 3 and Step 4 to install the oppo-
site bearing cap.
NOTE: If the joint is stiff or binding, strike the yoke
with a soft hammer to seat the needle bearings.
(7) Add grease to lube fitting, if equipped.
(8) Install the propeller shaft.
DOUBLE CARDAN UNIVERSAL
JOINTS
DISASSEMBLY
NOTE: Individual components of cardan universal
joints are not serviceable they must be replaced as
an assembly.(1) Remove the propeller shaft.
(2) Mark the propeller shaft yoke and link yoke for
assembly reference.
(3) Tap the outside of the bearing cap assembly
with drift to loosen snap rings.
(4) Remove all the bearing cap snap rings (Fig.
17).
Fig. 15 CROSS IN YOKE
1 - CROSS
2 - YOKE
Fig. 16 INSTALL BEARING ON TRUNNION
1 - BEARING CAP
2 - TRUNNION
Fig. 17 SNAP RINGS
WJPROPELLER SHAFT 3 - 9
SINGLE CARDAN UNIVERSAL JOINTS (Continued)

(5) Remove any grease fittings if equipped.
(6) Position a socket on the press with an inside
diameter large enough to receive the bearing cap
under the link yoke.
(7)
Place another socket with an outside diameter
smaller than the bearing cap on the upper bearing cap.
(8) Press one bearing cap from the outboard side of
the link yoke enough to grasp the cap with vise jaws
(Fig. 18).
(9) Grasp protruding bearing cap with vise jaws
and tap link yoke with a mallet and drift to remove
bearing cap (Fig. 19).(10) Flip assembly and repeat Step 6, Step 7, Step
8 and Step 9 to remove the opposite bearing cap.
(11) Remove the cross centering kit assembly and
spring (Fig. 20).
(12) Press the remaining bearing caps out the
other end of the link yoke as described above to com-
plete the disassembly.
ASSEMBLY
CAUTION: All alignment marks on the link yoke and
propeller shaft yoke must be aligned during assem-
bled.
(1) Apply extreme pressure (EP) N.L.G.I. Grade 1
or 2 grease to inside of yoke bores.
(2)
Fit a cross into the propeller shaft yoke (Fig. 21).
Fig. 18 PRESS OUT BEARING
Fig. 19 REMOVE BEARING FROM YOKE
Fig. 20 REMOVE CENTERING KIT
Fig. 21 INSTALL CROSS IN YOKE
3 - 10 PROPELLER SHAFTWJ
DOUBLE CARDAN UNIVERSAL JOINTS (Continued)

(3) Place a bearing cap over the trunnion and
align the cap with the yoke bore (Fig. 22). Keep nee-
dle bearings upright in the bearing cap.
(4) Press bearing cap into the yoke bore enough to
clear snap ring groove (Fig. 23).
(5) Install a snap ring.(6) Flip propeller shaft yoke and install other bear-
ing cap onto the opposite trunnion and install a snap
ring (Fig. 24).
(7) Fit the link yoke onto the remaining trunnions
and press both bearing caps into place and install
snap rings (Fig. 25).
Fig. 22 INSTALL BEARING CAP
Fig. 23 PRESS BEARING CAP
Fig. 24 PRESS BEARING CAP
Fig. 25 INSTALL LINK YOKE
WJPROPELLER SHAFT 3 - 11
DOUBLE CARDAN UNIVERSAL JOINTS (Continued)

(8) Install centering kit assembly inside the link
yoke (Fig. 26).
NOTE: Making sure the spring is properly posi-
tioned.
(9) Place two bearing caps on opposite trunnions of
the remaining cross. Fit the open trunnions into the
link yoke bores and the bearing caps into the center-
ing kit (Fig. 27).(10) Press the remaining two bearing caps into
place and install snap rings (Fig. 28).
(11) Tap the snap rings to seat them into the
grooves (Fig. 29).
Fig. 26 CENTERING KIT
Fig. 27 REMAINING CROSS
Fig. 28 PRESS BEARING CAP
Fig. 29 SEAT SNAP RINGS
3 - 12 PROPELLER SHAFTWJ
DOUBLE CARDAN UNIVERSAL JOINTS (Continued)

(12) Verify for proper assembly. Flexing the joint
beyond center, the joint should snap over-center in
both directions if correctly assembled (Fig. 30).
(13) Install the propeller shaft.
Fig. 30 VERIFY ASSEMBLY
WJPROPELLER SHAFT 3 - 13
DOUBLE CARDAN UNIVERSAL JOINTS (Continued)

FRONT TUBE AXLE
TABLE OF CONTENTS
page page
FRONT TUBE AXLE
REMOVAL.............................14INSTALLATION.........................14
FRONT TUBE AXLE
REMOVAL
(1) Raise and support the vehicle.
(2) Position a lifting device under the axle and
secure axle to lift.
(3) Remove the wheels and tires.
(4) Remove the brake rotors (Refer to 5 - BRAKES/
HYDRAULIC/MECHANICAL/ROTORS - REMOVAL)
and calipers.
(5) Disconnect wheel sensor wiring harness from
the vehicle wiring harness.
(6) Remove stabilizer bar links at the axle.
(7) Remove shock absorbers from axle brackets.
(8) Removet track bar.
(9) Remove tie rod and drag link from the steering
knuckle.
(10) Remove steering damper from the axle
bracket.
(11) Remove upper and lower suspension arms
from the axle brackets.
(12) Lower the lift enough to remove the axle. The
coil springs will drop with the axle.
(13) Remove the coil springs from the axle.
INSTALLATION
CAUTION: The weight of the vehicle must be sup-
ported by the springs before suspension arms and
track bar fasteners are tightened. If not at their nor-mal ride position, ride height and handling could be
affected.
(1) Install springs and retainer clips and tighten
retainer bolts to 21 N´m (16 ft. lbs.).
(2) Lift and position axle under the vehicle and
align it with the spring pads.
(3) Position upper and lower suspension arms in
the axle brackets and loosely install bolts and nuts.
(4) Install track bar to the axle bracket and loosely
install bolt.
(5) Install shock absorbers and tighten bolts to 23
N´m (17 ft. lbs.).
(6) Install stabilizer bar links to the axle brackets
and tighten nuts to 95 N´m (70 ft. lbs.).
(7) Install drag link and tie rod to the steering
knuckles.
(8) Install steering damper to the axle bracket and
tighten nut to 75 N´m (55 ft. lbs.).
(9) Install the brake rotors and calipers.
(10) Connect wheel speed sensor wiring harness, if
equipped.
(11) Install the wheel and tire assemblies.
(12) Remove lift from the axle and lower the vehi-
cle.
(13) Tighten upper suspension arm nuts to 75 N´m
(55 ft. lbs.). Tighten lower suspension arm nuts to
115 N´m (85 ft. lbs.).
(14) Tighten track bar bolt at the axle bracket to
100 N´m (74 ft. lbs.).
(15) Check the front wheel alignment.
3 - 14 FRONT TUBE AXLEWJ