fig. 78 CHRYSLER CARAVAN 2002 Manual Online

CV BOOT - INNER/OUTER
REMOVAL
(1) Remove half shaft from vehicle. (Refer to 3 -
DIFFERENTIAL & DRIVELINE/HALF SHAFT -
REMOVAL)
(2) Clamp the half shaft into a suitable vise with
protective jaws clamped onto the interconnecting
shaft (Fig. 7).
(3) Remove the large and small diameter retaining
clamps holding the CV boot to the CV joint and the
interconnecting shaft (Fig. 8).(4) Pull the boot back from the CV joint (Fig. 9).
(5) Remove the CV housing from the interconnect-
ing shaft and tripod assembly (Fig. 10).
Fig. 7 Clamp Shaft In Soft Jawed Vice
1 - HALF SHAFT BOOT
2 - HALF SHAFT
3 - VISE
Fig. 8 Remove Boot Clamps
1 - HALF SHAFT BOOT
2 - CLAMP
Fig. 9 Pull Back Boot
1 - HALF SHAFT BOOT
2 - HALF SHAFT JOINT
Fig. 10 Remove CV Housing
1 - HALF SHAFT JOINT HOUSING
2 - BOOT
RSHALF SHAFT - REAR3-17
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(6) Remove the snap-ring holding the tripod
assembly onto the interconnecting shaft (Fig. 11).
(7) Remove the tripod assembly from the intercon-
necting shaft (Fig. 12).(8) Remove the CV boot from the interconnecting
shaft (Fig. 13).
INSTALLATION
(1) Clean the interconnecting shaft and inner CV
joint of any residual grease and dirt.
(2) Slide the new small diameter retaining clamp
onto the interconnecting shaft.
(3) Install the CV boot onto the interconnecting
shaft (Fig. 14).
Fig. 12 Slide Tripod Off The Shaft
1 - TRIPOD ASSEMBLY
2 - AXLE SHAFT
3 - HALF SHAFT BOOT
Fig. 11 Remove Snap-Ring
1 - SNAP RING
2 - HALF SHAFT BOOT
3 - TRIPOD ASSEMBLY
4 - SNAP RING PLIERS
Fig. 13 Remove Boot
1 - HALF SHAFT BOOT
Fig. 14 Install CV Boot Onto Interconnecting Shaft
1 - HALF SHAFT BOOT
3 - 18 HALF SHAFT - REARRS
CV BOOT - INNER/OUTER (Continued)
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(4) Install the tripod assembly onto the intercon-
necting shaft (Fig. 15).
(5) Install the snap-ring to hold the tripod assem-
bly onto the interconnecting shaft (Fig. 16).(6) Install the new large diameter retaining clamp
onto the CV joint housing.
(7) Distribute 1/2 the amount of grease provided in
the seal boot service package (DO NOT USE ANY
OTHER TYPE OF GREASE) into tripod housing. Put
the remaining amount into the sealing boot.
(8) Install the CV housing onto the interconnecting
shaft and tripod assembly (Fig. 17).
(9) Clamp the half shaft into a suitable vise with
protective jaws clamped onto the interconnecting
shaft.
Fig. 16 Install Snap-Ring
1 - SNAP RING
2 - HALF SHAFT BOOT
3 - TRIPOD ASSEMBLY
4 - SNAP RING PLIERS
Fig. 15 Slide Tripod Onto The Interconnecting Shaft
1 - TRIPOD ASSEMBLY
2 - AXLE SHAFT
3 - HALF SHAFT BOOT
Fig. 17 Install CV Housing
1 - HALF SHAFT JOINT HOUSING
2 - BOOT
RSHALF SHAFT - REAR3-19
CV BOOT - INNER/OUTER (Continued)
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(10) Position the inner CV joint boot on intercon-
necting shaft so the raised bead on the inside of the
small diameter end of the seal boot is in mating
groove on interconnecting shaft (Fig. 18).
(11) Install inner CV joint seal boot to intercon-
necting shaft clamp evenly on sealing boot.
(12) Place crimping tool C-4975-A over bridge of
clamp (Fig. 19).
(13) Tighten nut on crimping tool C-4975-A until
jaws on tool are closed completely together, face to
face (Fig. 20).
CAUTION: The boot must not be dimpled, stretched
or out of shape in any way. If boot is NOT shaped
correctly, equalize pressure in boot and shape it by
hand.
(14) Position CV boot into the CV housing retain-
ing groove. Install the boot large diameter retaining
clamp evenly onto the boot.
(15) Clamp the CV joint boot to the CV joint, using
required procedure for type of boot clamp application.
Fig. 18 Sealing Boot Installation on Interconnecting
Shaft
1 - SEALING BOOT
2 - RAISED BEAD IN THIS AREA OF SEALING BOOT
3 - GROOVE
4 - INTERCONNECTING SHAFT
Fig. 19 Crimping Tool Installed on Sealing Boot
Clamp - Typical
1 - SPECIAL TOOL C-4975-A
2 - INTERCONNECTING SHAFT
3 - CLAMP
4 - SEALING BOOT
Fig. 20 Sealing Boot Retaining Clamp Installed -
Typical
1 - CLAMP
2 - JAWS OF SPECIAL TOOL C-4975-A MUST BE CLOSED
COMPLETELY TOGETHER HERE
3 - INTERCONNECTING SHAFT
4 - SEALING BOOT
3 - 20 HALF SHAFT - REARRS
CV BOOT - INNER/OUTER (Continued)
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CRIMP TYPE BOOT CLAMP
If seal boot uses crimp type boot clamp, use the fol-
lowing procedure to install the retaining clamp.
(1) Place crimping tool C-4975-A over bridge of
clamp (Fig. 21).
(2) Tighten nut on crimping tool C-4975-A until
jaws on tool are closed completely together, face to
face (Fig. 22).
LATCHING TYPE BOOT CLAMP
If seal boot uses low profile latching type boot
clamp, use the following procedure to install the
retaining clamp.
(1) Place prongs of clamp locking tool in the holes
of the clamp (Fig. 23).
(2) Squeeze tool together until top band of clamp is
latched behind the two tabs on lower band of clamp
(Fig. 24).
(16) Install the half shaft into the vehicle. (Refer
to 3 - DIFFERENTIAL & DRIVELINE/HALF SHAFT
- INSTALLATION)
Fig. 21 Crimping Tool Installed on Sealing Boot
Clamp - Typical
1 - CLAMP
2 - TRIPOD JOINT HOUSING
3 - SPECIAL TOOL C-4975-A
4 - SEALING BOOT
Fig. 22 Sealing Boot Retaining Clamp Installed -
Typical
1 - CLAMP
2 - TRIPOD HOUSING
3 - SPECIAL TOOL C-4975-A
4 - JAWS OF SPECIAL TOOL C-4975-A MUST BE CLOSED
COMPLETELY TOGETHER HERE
5 - SEALING BOOT
Fig. 23 Clamping Tool Installed on Sealing Boot
Clamp
1 - CLAMP
2 - TOOL YA3050, OR EQUIVALENT
3 - SEALING BOOT
Fig. 24 Sealing Boot Clamp Correctly Installed
1 - INNER TRIPOD JOINT HOUSING
2 - TOP BAND OF CLAMP MUST BE RETAINED BY TABS AS
SHOWN HERE TO CORRECTLY LATCH BOOT CLAMP
3 - SEALING BOOT
RSHALF SHAFT - REAR3-21
CV BOOT - INNER/OUTER (Continued)
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PROPELLER SHAFT
TABLE OF CONTENTS
page page
PROPELLER SHAFT
DESCRIPTION.........................22
OPERATION...........................22REMOVAL.............................23
INSTALLATION.........................23
SPECIFICATIONS - PROPELLER SHAFT.....23
PROPELLER SHAFT
DESCRIPTION
WARNING: Due to propeller shaft imbalance con-
cerns, the propeller shaft can only be serviced as
an assembly.
AWD models utilize a ªtwo-pieceº propeller shaft
(Fig. 1) to transmit power to the rear driveline mod-
ule assembly. This two-piece design consists of:
²Front and rear shaft segments.
²Plunging center CV joint²Center support bearing
²Rubber coupler at driveline module flange
The front shaft segment utilizes a CV joint at the
power transfer unit connection, and a plunging CV
joint at the center bearing location.
The rear shaft segment utilizes a center support
bearing at the forward position, and a rubber coupler
at the driveline module flange.
OPERATION
The propeller shaft (Fig. 1) is used to transmit
torque from the transaxle power transfer unit (PTU)
Fig. 1 Propeller Shaft Removal/Installation
1 - PTU FLANGE 3 - REAR DRIVELINE MODULE 5 - BOLT-CENTER SUPPORT BEARING-TO-
CROSSMEMBER
2 - CROSSMEMBER 4 - BOLT-PROPELLER SHAFT COUPLER-
T0-DRIVELINE MODULE6 - PROPELLER SHAFT ASSEMBLY
3 - 22 PROPELLER SHAFTRS
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to the rear driveline module of AWD equipped mod-
els.
The propeller shaft front half utilizes a CV joint at
the PTU flange, and a plunging CV joint at the cen-
ter bearing location. These joints are flexible, allow-
ing for torsional movement of the powertrain.
The propeller shaft rear half utilizes a center sup-
port bearing, which supports this two-piece assembly.
The bearing also stabilizes the rear shaft segment to
minimize axle wind-up. The rubber coupler at the
driveline module flange dampens out propeller shaft
torsional vibrations, as the driveline module it con-
nects to is fastened to the vehicle body.
REMOVAL
CAUTION: Propeller shaft removal is a two-man
operation. Never allow propeller shaft to hang while
connected to power transfer unit (PTU) or rear driv-
eline module flanges. A helper is required.
(1) Make sure transaxle is in neutral (N). Using
chalk, mark propeller shaft flanges at PTU and rear
driveline module for installation reference.
(2) Remove six propeller shaft-to-power transfer
unit bolts.
(3) Have helper remove three propeller shaft rub-
ber coupler-to-driveline module bolts while he/she
supports rear shaft by hand.
(4) Remove center bearing support-to-crossmember
bolts, while supporting front shaft with two hands.(5) Lower propeller shaft assembly to ground,
using care not to damage fore and aft flanges (Fig.
1).
INSTALLATION
CAUTION: Propeller shaft installation is a two-man
operation. Never allow propeller shaft to hang while
connected to power transfer unit (PTU) or rear driv-
eline module flanges. A helper is required.
(1) Make sure transaxle is in Neutral (N) position.
(2) Obtain a helper and lift propeller shaft assem-
bly into position (Fig. 1).
(3) While helper supports front half of shaft level
to underbody, align paint marks at driveline module
flange and install three propeller shaft rubber cou-
pler-to-rear driveline module bolts by hand. Do not
torque at this time.
(4) While helper supports front half of shaft level
to underbody, align chalk marks at PTU flange.
Install six propeller shaft-to-PTU flange bolts and
torque to 30 N´m (22 ft. lbs.). Torque bolts alternately
to ensure proper flange mating.
(5) Place center bearing into position. Install and
torque center bearing-to-crossmember bolts to 54
N´m (40 ft. lbs.).
(6) Torque propeller shaft rubber coupler-to-rear
driveline module assembly to 54 N´m (40 ft. lbs.).
SPECIFICATIONS - PROPELLER SHAFT
TORQUE SPECIFICATIONS
DESCRIPTION N´m Ft. Lbs. In. Lbs.
Bolt, Propeller Shaft Front
Flange-to-PTU Flange30 22 Ð
Bolt, Propeller Shaft Rear
Flange-to-Driveline Module Flange54 40 Ð
Bolt, Center Support Bearing-to-
Body54 40 Ð
RSPROPELLER SHAFT3-23
PROPELLER SHAFT (Continued)
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REAR DRIVELINE MODULE
TABLE OF CONTENTS
page page
REAR DRIVELINE MODULE
DESCRIPTION.........................24
OPERATION...........................24
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - REAR
DRIVELINE MODULE NOISE.............25
DIAGNOSIS AND TESTING - REAR
DRIVELINE MODULE OPERATION........27
REMOVAL.............................27
DISASSEMBLY.........................28
ASSEMBLY............................30
INSTALLATION.........................34
SPECIFICATIONS - REAR DRIVELINE
MODULE............................35
SPECIAL TOOLS.......................35
BI-DIRECTIONAL OVERRUNNING CLUTCH
DESCRIPTION.........................36
OPERATION...........................38
DIFFERENTIAL ASSEMBLY
DESCRIPTION.........................41OPERATION...........................41
FLUID - DIFFERENTIAL ASSEMBLY
STANDARD PROCEDURE - DIFFERENTIAL
ASSEMBLY FLUID DRAIN AND FILL.......42
FLUID
STANDARD PROCEDURE - OVERRUNNING
CLUTCH HOUSING FLUID CHANGE.......43
VISCOUS COUPLER
DESCRIPTION.........................44
OPERATION...........................44
TORQUE ARM
REMOVAL.............................46
INSTALLATION.........................46
INPUT FLANGE SEAL
REMOVAL.............................46
INSTALLATION.........................47
OUTPUT FLANGE SEAL
REMOVAL.............................48
INSTALLATION.........................49
REAR DRIVELINE MODULE
DESCRIPTION
The rear driveline module assembly (Fig. 1) con-
sists of four main components:
²Bi-Directional Overrunning Clutch (BOC)
²Viscous Coupling
²Differential Assembly
²Torque Arm
The viscous coupling and bi-directional overrun-
ning clutch are contained within an overrunning
clutch housing, which fastens to the differential
assembly. The overrunning clutch housing and differ-
ential assembly have unique fluid sumps, each
requiring their own type and capacity of fluid. The
overrunning clutch housing requires MopartATF+4
(Automatic Transmission FluidÐType 9602) or equiv-
alent. The differential assembly requires
Driveline module service is limited to the following
components:
²Differential Assembly (serviced only as assem-
bly)
²Viscous Coupling
²Bi-Directional Overrunning Clutch (BOC)
²Overrunning Clutch Housing
²Seals (Input Flange, Output Flange, Overrun-
ning Clutch Housing O-rings)²Input Flange/Shield
²Torque Arm
²Vents
²Fasteners
OPERATION
The primary benefits of All Wheel Drive are:
²Superior straight line acceleration, and corner-
ing on all surfaces
²Better traction and handling under adverse con-
ditions, resulting in improved hill climbing ability
and safer driving.
The heart of the system is an inter-axle viscous
coupling. The vehicle retains predominantly front-
wheel drive characteristics, but the All Wheel Drive
capability takes effect when the front wheels start to
slip. Under normal level road, straight line driving,
100% of the torque is allocated to the front wheels.
The viscous coupling controls and distributes torque/
power to the rear wheels. The viscous coupling trans-
mits torque to the rear wheels in proportion of the
amount of the slippage at the front wheels. Thais
variable torque distribution is automatic with no
driver inputs required. The coupling is similar to a
multi-plate clutch. It consists of a series of closely
spaced discs, which are alternately connected to the
front and rear drive units. The unit is totally sealed
and partially filled with silicone fluid. There is no
3 - 24 REAR DRIVELINE MODULERS
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adjustment, maintenance or fluid checks required
during the life of the unit.
The overrunning clutch allows the rear wheels to
overrun the front wheels during a rapid front wheel
lock braking maneuver. The overrunning action pre-
vents any feed-back of front wheel braking torque to
the rear wheels. It also allows the braking system to
control the braking behavior as a two wheel drive
(2WD) vehicle.
The overrunning clutch housing has a separate oil
sump and is filled independently from the differen-
tial. The fill plug is located on the side of the over-
running clutch case. When filling the overrunning
clutch with lubricant use MopartATF+4 (Automatic
Transmission FluidÐType 9602) or equivalent.
The differential assembly contains a conventional
open differential with hypoid ring gear and pinion
gear set. The hypoid gears are lubricated by SAE
80W-90 gear lubricant.DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - REAR DRIVELINE
MODULE NOISE
Different sources can be the cause of noise that the
rear driveline module assembly is suspected of mak-
ing. Refer to the following causes for noise diagnosis.
DRIVELINE MODULE ASSEMBLY NOISE
The most important part of driveline module ser-
vice is properly identifying the cause of failures and
noise complaints. The cause of most driveline module
failures is relatively easy to identify. The cause of
driveline module noise is more difficult to identify.
If vehicle noise becomes intolerable, an effort
should be made to isolate the noise. Many noises that
are reported as coming from the driveline module
may actually originate at other sources. For example:
²Tires
²Road surfaces
Fig. 1 AWD Driveline Module Assembly
1 - TORQUE ARM 8 - WASHER 15 - PLUG-OVERRUNNING CLUTCH HOUSING DRAIN
2 - INPUT FLANGE 9 - BI-DIRECTIONAL OVERRUNNING CLUTCH (BOC) 16 - SNAP RING
3 - FLANGE NUT 10 - VISCOUS COUPLER 17 - BEARING
4 - WASHER 11 - SHIM (SELECT) 18 - OVERRUNING CLUTCH HOUSING
5 - SHIELD 12 - O-RING 19 - SEAL-INPUT FLANGE
6 - VENT 13 - DIFFERENTIAL ASSEMBLY
7 - O-RING 14 - PLUG-DIFFERENTIAL FILL
RSREAR DRIVELINE MODULE3-25
REAR DRIVELINE MODULE (Continued)
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DIAGNOSIS AND TESTING - REAR DRIVELINE
MODULE OPERATION
Driveline module operation requires relatively
straight-forward diagnosis. Refer to the following
chart:
DRIVELINE MODULE DIAGNOSIS CHART
CONDITION POSSIBLE CAUSES CORRECTION
Rear wheels not
overrunning1) Bi-directional overrunning clutch
failure1) Replace overrunning clutch
components as required
No AWD in forward or
reverse directions, propeller
shaft turning1) Bi-directional overrunning clutch
failure1) Replace overrunning clutch
components as required
2) Viscous coupling failure 2) Replace viscous coupling
3) Rear differential failure 3) Replace the rear differential
assembly
No AWD in forward or
reverse directions, propeller
shaft not turning1) Power transfer unit failure. 1) Replace power transfer unit
components as necessary
Vibration at all speeds,
continuous torque transfer1) Mis-matched tires, worn tires on
front axle.1) Replace worn or incorrect
(mis-matched) tires with same
make and size
REMOVAL
(1) Raise vehicle on hoist.
(2) Drain fluid from overrunning clutch housing
and/or differential assembly if necessary.
(3) Remove propeller shaft. (Refer to 3 - DIFFER-
ENTIAL & DRIVELINE/PROPELLER SHAFT -
REMOVAL)
(4) Disconnect left and right rear halfshafts from
output flanges (Fig. 2).(5) Remove torque arm mount to body bolts.
(6) Position transmission jack to driveline module
assembly and secure assembly to jack.
(7) Remove two driveline module-to-body bolts
(Fig. 3).
(8) Lower driveline module from vehicle and
remove from jack.
Fig. 2 Half Shaft Mounting Bolts
1 - SHAFT
2 - FLANGE
Fig. 3 Rear Drive Line Module Assembly Mounting
Bolts
1 - DRIVELINE MODULE RETAINING BOLT (2)
2 - RUBBER ISOLATOR
3 - WASHER
RSREAR DRIVELINE MODULE3-27
REAR DRIVELINE MODULE (Continued)
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