2003 CHRYSLER CARAVAN automatic transmission

Calibrate the tester according to the manufactur-
er's instructions. The shop air source for testing
should maintain 483 kPa (70 psi) minimum, 1,379
kPa (200 psi) maximum, with 552 kPa (80 psi) rec-
ommended.
Perform the test procedures on each cylinder
according to the tester manufacturer's instructions.
While testing, listen for pressurized air escaping
through the throttle body, tailpipe and oil filler cap
opening. Check for bubbles in the coolant.
All gauge pressure indications should be equal,
with no more than 25% leakage per cylinder.
FOR EXAMPLE:At 552 kPa (80 psi) input pres-
sure, a minimum of 414 kPa (60 psi) should be main-
tained in the cylinder.
STANDARD PROCEDURE
STANDARD PROCEDURE - MEASURING
BEARING CLEARANCE USING PLASTIGAGE
Engine crankshaft bearing clearances can be deter-
mined by use of Plastigage or equivalent. The follow-
ing is the recommended procedure for the use of
Plastigage:
(1) Remove oil film from surface to be checked.
Plastigage is soluble in oil.
(2) Place a piece of Plastigage across the entire
width of the bearing shell in the cap approximately
6.35 mm (1/4 in.) off center and away from the oil
holes (Fig. 3). (In addition, suspected areas can be
checked by placing the Plastigage in the suspected
area). Torque the bearing cap bolts of the bearing
being checked to the proper specifications.
(3) Remove the bearing cap and compare the
width of the flattened Plastigage with the metric
scale provided on the package. Locate the band clos-est to the same width. This band shows the amount
of clearance in thousandths of a millimeter. Differ-
ences in readings between the ends indicate the
amount of taper present. Record all readings taken.
Compare clearance measurements to specs found in
engine specifications (Refer to 9 - ENGINE - SPECI-
FICATIONS).Plastigage generally is accompa-
nied by two scales. One scale is in inches, the
other is a metric scale.
NOTE: Plastigage is available in a variety of clear-
ance ranges. Use the most appropriate range for
the specifications you are checking.
(4) Install the proper crankshaft bearings to
achieve the specified bearing clearances.
STANDARD PROCEDURE - FORM-IN-PLACE
GASKETS AND SEALERS
There are numerous places where form-in-place
gaskets are used on the engine. Care must be taken
when applying form-in-place gaskets to assure
obtaining the desired results.Do not use form-in-
place gasket material unless specified.Bead size,
continuity, and location are of great importance. Too
thin a bead can result in leakage while too much can
result in spill-over which can break off and obstruct
fluid feed lines. A continuous bead of the proper
width is essential to obtain a leak-free gasket.
There are numerous types of form-in-place gasket
materials that are used in the engine area. Mopart
Engine RTV GEN II, MopartATF-RTV, and Mopart
Gasket Maker gasket materials, each have different
properties and can not be used in place of the other.
MOPARtENGINE RTV GEN IIis used to seal
components exposed to engine oil. This material is a
specially designed black silicone rubber RTV that
retains adhesion and sealing properties when
exposed to engine oil. Moisture in the air causes the
material to cure. This material is available in three
ounce tubes and has a shelf life of one year. After one
year this material will not properly cure. Always
inspect the package for the expiration date before
use.
MOPARtATF RTVis a specifically designed
black silicone rubber RTV that retains adhesion and
sealing properties to seal components exposed to
automatic transmission fluid, engine coolants, and
moisture. This material is available in three ounce
tubes and has a shelf life of one year. After one year
this material will not properly cure. Always inspect
the package for the expiration date before use.
MOPARtGASKET MAKERis an anaerobic type
gasket material. The material cures in the absence of
air when squeezed between two metallic surfaces. It
will not cure if left in the uncovered tube. The
Fig. 3 Plastigage Placed in Lower ShellÐTypical
1 - PLASTIGAGE
9 - 84 ENGINE 3.3/3.8LRS
ENGINE 3.3/3.8L (Continued)
ProCarManuals.com

FLEX PLATE
REMOVAL
(1) Remove the transaxle (Refer to 21 - TRANS-
MISSION/TRANSAXLE/AUTOMATIC - 41TE -
REMOVAL).
(2) Remove flex plate attaching bolts.
(3) Remove the flex plate (Fig. 85).
INSTALLATION
(1) Position flex plate with backing plate on the
crankshaft (Fig. 85).
(2) Apply MopartLock & Seal Adhesive to the flex
plate bolts.
(3) Install flex plate bolts (Fig. 85). Tighten bolts
to 95 N´m (70 ft. lbs.).
(4) Install the transaxle (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 41TE - INSTAL-
LATION).
ENGINE MOUNTING
DESCRIPTION
The engine mounting system consist of four
mounts; right and a left side support the powertrain,
and a front and a rear mount control powertrain
torque. The right side mount is a hydro-type (Fig.
86), all others are of molded rubber material.
FRONT MOUNT
REMOVAL
(1) Support the engine and transmission assembly
with a floor jack so it will not rotate.
(2) Remove the front engine mount through bolt
from the insulator and front crossmember mounting
bracket (Fig. 87).
(3) Remove six screws from air dam to allow
access to the front mount screws.
(4) Remove the front engine mount screws and
remove the insulator assembly (Fig. 87).
(5) Remove the front mounting bracket, if neces-
sary (Fig. 87).
INSTALLATION
(1) Install the front mounting bracket, if removed
(Fig. 87).
(2) Install the front engine mount through bolt
from the insulator and front crossmember mounting
bracket (Fig. 87).
(3) Install the insulator assembly and mounting
screws (Fig. 87).
Fig. 85 FLEX PLATE
1 - FLEX PLATE
2 - BOLT (QTY. 8)
3 - BACKING PLATE
Fig. 86 Engine Hydro-type Mount - Right Side
1 - BOLT
2 - BOLT
3 - FRAME RAIL
4 - RIGHT MOUNT - 2.4L ENGINE
5 - RIGHT MOUNT - 3.3/3.8L ENGINE
RSENGINE 3.3/3.8L9 - 131
ProCarManuals.com

REMOVAL
(1) Disconnect the negative battery cable.
(2) Raise vehicle and support.
(3) Disconnect the electrical connector (Fig. 8).
(4) Remove crankshaft sensor bolt (Fig. 9).
(5) Remove the crankshaft sensor.
INSTALLATION - 2.4L
(1) Install the crankshaft sensor.
(2) Install crankshaft sensor bolt and tighten.
(3) Connect the electrical connector (Fig. 8).
(4) Lower vehicle.
(5) Connect the negative battery cable.
ENGINE SPEED SENSOR
DESCRIPTION
The PCM receives a signal from the TCM to indi-
cate vehicle speed on automatic transmission cars.
On 4 cylinder Manual transmission cars (if equipped)
vehicle, a dedicated vehicle speed sensor is connected
Fig. 5 CRANKSHAFT SENSOR 3.3/3.8L
Fig. 6 Crankshaft Position Sensor
1 - CRANKSHAFT POSITION SENSOR
Fig. 7 Timing Slots
1 - TORQUE CONVERTER DRIVE PLATE
2 - SLOTS
Fig. 8 CRANKSHAFT SENSOR 2.4L
RSFUEL INJECTION14-25
CRANKSHAFT POSITION SENSOR (Continued)
ProCarManuals.com

LOCK CYLINDER HOUSING
DESCRIPTION - IGNITION INTERLOCK
All vehicles equipped with automatic transaxles
have an interlock system. The system prevents shift-
ing the vehicle out of Park unless the ignition lock
cylinder is in the Unlock, Run or Start position. In
addition, the operator cannot rotate the key to the
lock position unless the shifter is in the park posi-
tion. On vehicles equipped with floor shift refer to
the - Transaxle for Automatic Transmission Shifter/
Ignition Interlock.
REMOVAL
NOTE: Before proceeding, review all Steering Col-
umn and Airbag Warnings and Cautions. (Refer to
19 - STEERING/COLUMN - WARNING)(Refer to 8 -
ELECTRICAL/RESTRAINTS - WARNING)
(1) Remove battery ground cable terminal from
battery negative post and isolate.
(2) Under instrument panel, remove silencer panel
below lower steering column cover.
(3) Remove screws securing lower steering column
cover/knee blocker, then remove it (Fig. 17).
(4) Disconnect parking brake release link at
release handle.
(5) Compress tabs on sides of data link diagnostic
connector and remove it from knee blocker reinforce-
ment plate.(6) Remove screws securing knee blocker reinforce-
ment plate in place, then remove reinforcement plate
(Fig. 17).
(7) Remove the upper and lower column shrouds.
(Refer to 19 - STEERING/COLUMN/LOWER
SHROUD - REMOVAL)
(8) Unsnap the trim bezel on the instrument panel
between the instrument cluster and the steering col-
umn.
(9) Remove the 2 screws securing the steering col-
umn fixed shroud to the steering column (Fig. 18),
then remove the shroud.
(10) Remove the two screws holding the metal
cover in place below the shifter/ignition interlock
linkage (Fig. 19), then remove the cover.
Fig. 17 Lower Steering Column Cover And
Reinforcement
1 - INSTRUMENT PANEL
2 - REINFORCEMENT PLATE
3 - LOWER STEERING COLUMN COVER/KNEE BLOCKER
Fig. 18 Fixed Shroud Mounting
1 - SCREWS
2 - SHROUD
Fig. 19 Cover Removal/Installation
1 - IGNITION SWITCH
2 - SCREW
3 - COVER
RSCOLUMN19-17
ProCarManuals.com

FLUID
STANDARD PROCEDURE - POWER STEERING
FLUID LEVEL CHECKING
WARNING: FLUID LEVEL SHOULD BE CHECKED
WITH THE ENGINE OFF TO PREVENT INJURY
FROM MOVING PARTS AND TO ENSURE ACCU-
RATE FLUID LEVEL READING.
The fluid level can be read on the exterior of the
power steering fluid reservoir. The fluid level should
be within the ªFILL RANGEº when the fluid is at
normal ambient temperature, approximately 21ÉC to
27ÉC (70ÉF to 80ÉF) (Fig. 17).
Before removing the power steering filler cap, wipe
the reservoir filler cap free of dirt and debris. Do not
overfill the power steering system.Use only
MopartATF+4 Automatic Transmission Fluid
(MS-9602) in the power steering system.For
additional information on Automatic Transmission
Fluid, (Refer to LUBRICATION & MAINTENANCE/
FLUID TYPES - DESCRIPTION).
CAUTION: Use only MoparTATF+4 Automatic Trans-
mission Fluid (MS-9602). Use of other MoparT
power steering fluids (MS5931 and MS9933) should
be avoided to ensure peak performance of the
power steering system under all operating condi-
tions.
FLUID COOLER
DESCRIPTION
All models (except 2.5L Diesel) are equipped with a
cooler for the power steering system fluid. The power
steering fluid cooler is located on the front suspen-sion cradle crossmember reinforcement (Fig. 18).
There are two different size coolers depending on
model and options. There is a standard 6-inch and an
8-inch.
OPERATION
The purpose of the power steering fluid cooler is to
keep the temperature of the power steering system
fluid from rising to a level that would affect the per-
formance of the power steering system.
The cooler used on this vehicle is referred to as a
fluid-to-air type cooler. This means that the air flow
across the tubes (and fines surrounding them) of the
cooler is used to extract the heat from the cooler
which it has absorbed from the power steering fluid
flowing through it. The cooler is placed in the power
steering fluid return line, between the steering gear
and the power steering fluid reservoir.
REMOVAL
(1) Using a siphon pump, remove as much fluid as
possible from the power steering fluid reservoir.
(2) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
(3) Remove the hose clamps at the cooler and
remove the hoses from the cooler inlet and outlet
tubes.
(4) Remove the 2 bolts attaching the power steer-
ing cooler cradle crossmember reinforcement (Fig.
18). Remove the cooler.
Fig. 17 Power Steering Fluid Reservoir
Fig. 18 Power Steering Cooler
1 - CRADLE CROSSMEMBER REINFORCEMENT
2 - POWER STEERING COOLER
19 - 44 PUMPRS
ProCarManuals.com

TRANSMISSION/TRANSAXLE
TABLE OF CONTENTS
page page
POWER TRANSFER UNIT..................1
T850 MANUAL TRANSAXLE...............2141TE AUTOMATIC TRANSAXLE............116
POWER TRANSFER UNIT
TABLE OF CONTENTS
page page
POWER TRANSFER UNIT
DESCRIPTION..........................1
OPERATION............................3
DIAGNOSIS AND TESTING
SEAL IDENTIFICATION..................3
FLUID LEAK DIAGNOSIS................3
STANDARD PROCEDURE
STANDARD PROCEDURE - FLUID LEVEL
INSPECTION..........................4
STANDARD PROCEDURE - PTU FLUID
CHANGE.............................5
REMOVAL.............................5
INSTALLATION..........................6
ADJUSTMENTS
OUTPUT FLANGE SHIM SELECTION.......7
SPECIFICATIONS
TORQUE.............................7
SPECIAL TOOLS
SDP POWER TRANSFER UNIT............8
DIFFERENTIAL CARRIER SEAL
REMOVAL.............................9
INSTALLATION..........................9
END COVER BALL BEARING
REMOVAL.............................9INSTALLATION.........................10
END COVER SEAL
REMOVAL.............................11
INSTALLATION.........................11
HALF SHAFT INNER SEAL
REMOVAL.............................12
INSTALLATION.........................12
INPUT SHAFT COVER SEAL
REMOVAL.............................13
INSTALLATION.........................14
INPUT SHAFT END SEAL
REMOVAL.............................15
INSTALLATION.........................16
INPUT SHAFT SEAL
REMOVAL.............................17
INSTALLATION.........................18
OUTER HALF SHAFT SEAL
REMOVAL.............................19
INSTALLATION.........................19
REAR COVER O-RING
REMOVAL.............................19
INSTALLATION.........................20
POWER TRANSFER UNIT
DESCRIPTION
The Power Transfer Unit (P.T.U.) is attached to a
modified automatic transaxle case where the right
half shaft extension housing would normally be
located.
The Power Transfer Unit is sealed from the trans-
axle and has its own oil sump. The Unit uses MopartSAE 80W-90 Gear and Axle Lubricant (MS-9020) and
holds 1.15 liters (1.22 quarts).
Service of the Power Transfer Unit is limited to:
²Fluid Change
²Seals
²Gaskets
²One ball bearing
²Output flange
If the ring gear and pinion, any tapered roller
bearings, case, covers, or pinion carrier fail the entire
unit must be replaced.
RSTRANSMISSION/TRANSAXLE21-1
ProCarManuals.com

SPECIFICATIONS - T850 MANUAL TRANSAXLE
GENERAL SPECIFICATIONS
DESCRIPTION SPECIFICATION
Transaxle TypeConstant-mesh, fully synchronized 5-speed with integral
differential
Lubrication MethodSplash oil collected in case passage and oil trough and
distributed to mainshafts via gravity
Fluid Type ATF+4 (Automatic Transmission FluidÐType 9602)
GEAR RATIOS
GEAR RATIO (2.4L Gas) RATIO (2.5L TD)
1st 3.65 3.65
2nd 2.05 2.05
3rd 1.39 1.37
4th 1.03 0.97
5th 0.83 0.76
Reverse 3.47 3.47
Final Drive Ratio 3.77 3.77
Overall Top Gear 3.12 2.67
INPUT SHAFT
BLOCKER RING WEAR GAP
3rd Gear 0.856-1.539 mm (0.0338-0.0606 in.)
4th Gear 0.762-1.631 mm (0.030-0.064 in.)
GEAR END PLAY
3rd Gear 0.099-0.505 mm (0.004-0.020 in.)
4th Gear 0.048-0.457 mm (0.002-0.018 in.)
21 - 56 T850 MANUAL TRANSAXLERS
T850 MANUAL TRANSAXLE (Continued)
ProCarManuals.com

41TE AUTOMATIC TRANSAXLE
TABLE OF CONTENTS
page page
41TE AUTOMATIC TRANSAXLE
DESCRIPTION........................117
OPERATION..........................119
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - 41TE
TRANSAXLE GENERAL DIAGNOSIS......119
DIAGNOSIS AND TESTING - ROAD TEST . . 119
DIAGNOSIS AND TESTING - HYDRAULIC
PRESSURE TESTS...................120
DIAGNOSIS AND TESTING - CLUTCH AIR
PRESSURE TESTS...................122
DIAGNOSIS AND TESTING - TORQUE
CONVERTER HOUSING FLUID LEAKAGE . . 123
REMOVAL............................124
DISASSEMBLY........................125
ASSEMBLY...........................144
INSTALLATION........................166
SCHEMATICS AND DIAGRAMS
41TE TRANSAXLE HYDRAULIC
SCHEMATICS.......................169
SPECIFICATIONS - 41TE TRANSAXLE......181
SPECIAL TOOLS
41TE AUTOMATIC TRANSAXLE.........183
ACCUMULATOR
DESCRIPTION........................188
OPERATION..........................189
AUTOSTICK SWITCH
DESCRIPTION........................189
OPERATION..........................189
DRIVING CLUTCHES
DESCRIPTION........................190
OPERATION..........................190
FINAL DRIVE
DISASSEMBLY........................190
ASSEMBLY...........................195
ADJUSTMENTS
ADJUSTMENT - DIFFERENTIAL BEARING
PRELOAD..........................199
FLUID
STANDARD PROCEDURE
FLUID LEVEL AND CONDITION CHECK . . . 201
STANDARD PROCEDURE - FLUID AND
FILTER SERVICE.....................203
GEAR SHIFT CABLE
REMOVAL............................204
INSTALLATION........................205
ADJUSTMENTS
GEARSHIFT CABLE ADJUSTMENT.......206HOLDING CLUTCHES
DESCRIPTION........................207
OPERATION..........................207
INPUT CLUTCH ASSEMBLY
DISASSEMBLY........................208
ASSEMBLY...........................216
OIL PUMP
DESCRIPTION........................230
OPERATION..........................230
DISASSEMBLY........................230
ASSEMBLY...........................232
PLANETARY GEARTRAIN
DESCRIPTION........................232
OPERATION..........................232
SEAL - OIL PUMP
REMOVAL............................232
INSTALLATION........................233
SHIFT INTERLOCK SOLENOID
DESCRIPTION........................233
OPERATION..........................233
DIAGNOSIS AND TESTING - BRAKE/
TRANSMISSION SHIFT INTERLOCK
SOLENOID..........................235
REMOVAL............................235
INSTALLATION........................236
SOLENOID/PRESSURE SWITCH ASSY
DESCRIPTION........................237
OPERATION..........................237
REMOVAL............................238
INSTALLATION........................239
SPEED SENSOR - INPUT
DESCRIPTION........................239
OPERATION..........................240
REMOVAL............................240
INSTALLATION........................240
SPEED SENSOR - OUTPUT
DESCRIPTION........................241
OPERATION..........................241
REMOVAL............................241
INSTALLATION........................242
TORQUE CONVERTER
DESCRIPTION........................242
OPERATION..........................245
REMOVAL............................247
INSTALLATION........................247
TRANSMISSION CONTROL RELAY
DESCRIPTION........................247
OPERATION..........................248
21 - 116 41TE AUTOMATIC TRANSAXLERS
ProCarManuals.com