DODGE TOWN AND COUNTRY 2001 Service Manual

DIAGNOSIS AND TESTING - CLUTCH AIR
PRESSURE TESTS
Inoperative clutches can be located using a series
of tests by substituting air pressure for fluid pressure
(Fig. 4) (Fig. 5). The clutches may be tested by apply-
ing air pressure to their respective passages. The
valve body must be removed and Tool 6056 installed.
To make air pressure tests, proceed as follows:
NOTE: The compressed air supply must be free of
all dirt and moisture. Use a pressure of 30 psi.
Remove oil pan and valve body. See Valve body
removal.
OVERDRIVE CLUTCH
Apply air pressure to the overdrive clutch apply
passage and watch for the push/pull piston to move
forward. The piston should return to its starting
position when the air pressure is removed.
REVERSE CLUTCH
Apply air pressure to the reverse clutch apply pas-
sage and watch for the push/pull piston to move rear-
ward. The piston should return to its starting
position when the air pressure is removed.
2/4 CLUTCH
Apply air pressure to the feed hole located on the
2/4 clutch retainer. Look in the area where the 2/4
piston contacts the first separator plate and watch
carefully for the 2/4 piston to move rearward. The
piston should return to its original position after the
air pressure is removed.
LOW/REVERSE CLUTCH
Apply air pressure to the low/reverse clutch feed
hole (rear of case, between 2 bolt holes). Then, look
in the area where the low/reverse piston contacts the
first separator plate. Watch carefully for the piston to
move forward. The piston should return to its origi-
nal position after the air pressure is removed.
UNDERDRIVE CLUTCH
Because this clutch piston cannot be seen, its oper-
ation is checked by function. Air pressure is applied
to the low/reverse and the 2/4 clutches. This locks the
output shaft. Use a piece of rubber hose wrapped
around the input shaft and a pair of clamp-on pliers
to turn the input shaft. Next apply air pressure to
the underdrive clutch. The input shaft should not
rotate with hand torque. Release the air pressure
and confirm that the input shaft will rotate.
DIAGNOSIS AND TESTING - TORQUE
CONVERTER HOUSING FLUID LEAKAGE
When diagnosing converter housing fluid leaks,
three actions must be taken before repair:
(1) Verify proper transmission fluid level.
(2) Verify that the leak originates from the con-
verter housing area and is transmission fluid.
(3) Determine the true source of the leak.
Fluid leakage at or around the torque converter
area may originate from an engine oil leak (Fig. 6).
The area should be examined closely. Factory fill
fluid is red and, therefore, can be distinguished from
engine oil.
Some suspected converter housing fluid leaks may
not be leaks at all. They may only be the result of
residual fluid in the converter housing, or excess
fluid spilled during factory fill, or fill after repair.
Fig. 4 Air Pressure Test Plate
1 - TOOL 6056
2 - ACCUMULATORS
Fig. 5 Testing Reverse Clutch
1 - TOOL 6056
2 - AIR NOZZLE
21 - 164 AUTOMATIC - 41TERS
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Converter housing leaks have several potential
sources. Through careful observation, a leak source
can be identified before removing the transmission
for repair.
Pump seal leaks tend to move along the drive hub
and onto the rear of the converter (Fig. 6). Pump
o-ring or pump body leaks follow the same path as a
seal leak. Pump attaching bolt leaks are generally
deposited on the inside of the converter housing and
not on the converter itself. Pump seal or gasket leaks
usually travel down the inside of the converter hous-
ing (Fig. 6).
TORQUE CONVERTER LEAKAGE
Possible sources of torque converter leakage are:
²Torque converter weld leaks at the outside diam-
eter weld (Fig. 7).
²Torque converter hub weld (Fig. 7).
REMOVAL
NOTE: If transaxle assembly is being replaced or
overhauled (clutch and/or seal replacement), it is
necessary to perform the TCM Quick Learn Proce-
dure. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/TRANSMISSION CONTROL
MODULE - STANDARD PROCEDURE)NOTE: If the torque converter assembly is being
replaced, it is necessary to reset the TCC Break-In
Strategy. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/TRANSMISSION CONTROL
MODULE - STANDARD PROCEDURE)
(1) Disconnect battery cables.
(2) Remove battery shield (Fig. 8).
(3) Remove coolant recovery bottle (Fig. 9).
Fig. 6 Converter Housing Leak Paths
1 - PUMP SEAL
2 - PUMP VENT
3 - PUMP BOLT
4 - PUMP GASKET
5 - CONVERTER HOUSING
6 - CONVERTER
7 - REAR MAIN SEAL LEAK
Fig. 7 Converter Leak Points - Typical
1 - OUTSIDE DIAMETER WELD
2 - TORQUE CONVERTER HUB WELD
3 - STARTER RING GEAR
4 - LUG
Fig. 8 Battery Thermal Guard
1 - BATTERY THERMAL GUARD
2 - INTELLIGENT POWER MODULE
3 - FRONT CONTROL MODULE
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(4) Remove fluid level indicator/tube assembly.
Plug opening to prevent debris from entering trans-
axle.
(5) Using a blade or suitable hose cutter, cut trans-
axle oil cooler lines off flush with fittings. Plug lines
and fittings to prevent debris from entering transaxle
or cooler circuit. A service splice kit will be installed
upon reassembly.
(6) Disconnect input and output shaft speed sensor
connectors (Fig. 10).
(7) Disconnect transmission range sensor (TRS)
connector (Fig. 10).
(8) Disconnect solenoid/pressure switch assembly
connector (Fig. 10).
(9) Disconnect gear shift cable from manual valve
lever and upper mount bracket (Fig. 11).
(10) Disconnect crankshaft position sensor (if
equipped).
(11) Reposition leak detection pump harness and
hoses.
(12) Remove wiper module assembly to gain access
to and remove rear mount bracket bolts. (Refer to 8 -
ELECTRICAL/WIPERS/WASHERS/WIPER MOD-
ULE - REMOVAL)
(13) Remove rear mount bracket-to-transaxle case
bolts (Fig. 12).
(14) Remove transaxle upper bellhousing-to-block
bolts.
(15) Raise vehicle on hoist.
(16) Remove transaxle oil pan and drain fluid into
suitable container.
(17) Remove front wheel/tire assemblies.
Fig. 9 Coolant Recovery Bottle
1 - UPPER BOLT ATTACHING TO BATTERY TRAY
2 - COOLANT RECOVERY/RESERVE CONTAINER
3 - UPPER BOLT
4 - HOSE
5 - LOWER BOLT (QTY. 2)
6 - LEFT SIDE FRAME RAIL
Fig. 10 Component Connector LocationÐTypical
1 - SOLENOID/PRESSURE SWITCH ASSY. CONNECTOR
2 - INPUT SPEED SENSOR CONNECTOR
3 - OUTPUT SPEED SENSOR CONNECTOR
4 - TRANSMISSION RANGE SENSOR CONNECTOR
Fig. 11 Gearshift Cable at Transaxle - Typical
1 - MANUAL VALVE LEVER
2 - GEAR SHIFT CABLE
3 - UPPER MOUNT BRACKET
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(18) Remove left and right halfshaft assemblies.
(Refer to 3 - DIFFERENTIAL & DRIVELINE/HALF
SHAFT - REMOVAL)
(19) Disconnect exhaust pipe at manifold (Fig. 13).
(20) Remove cradle plate.
(21) AWD models: Remove power transfer unit.
(Refer to 21 - TRANSMISSION/TRANSAXLE/
POWER TRANSFER UNIT - REMOVAL)
(22) Remove rear mount bracket-to-transaxle case
lower (horizontal) bolt (Fig. 12).
(23) Remove rear mount heat shield (Fig. 14).
(24) Remove rear mount-to-bracket thru-bolt and
nut (Fig. 15).
(25) Remove front mount/bracket assembly.
(26) Remove starter motor.
(27) Remove lateral bending brace.(28) Remove inspection cover.
(29) Remove torque converter-to-drive plate bolts.
(30) Support engine/transaxle assembly at engine
oil pan with screw jack and wood block.
(31) Partially remove left wheelhouse splash shield
to gain access to and remove upper mount thru-bolt
(Fig. 16).
(32) Lower engine/transaxle assembly with screw
jack.
(33) Obtain helper and transmission jack. Secure
transmission jack to transaxle assembly.
(34) Remove upper mount bracket from transaxle
(Fig. 16).
(35) Remove remaining transaxle bellhousing-to-
engine bolts.
(36) Remove transaxle assembly from vehicle.
Fig. 12 Rear Mount Bracket - Typical
1 - BOLT - VERTICAL
2 - BRACKET - REAR MOUNT3 - BOLT - HORIZONTAL
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Fig. 13 Catalytic Converter to Exhaust Manifold
1 - FLAG NUT
2 - GASKET
3 - BOLT
4 - CATALYTIC CONVERTER
Fig. 14 Rear Mount Heat Shield
1 - BOLT - HEAT SHIELD
2 - HEAT SHIELD
3 - CLIP
4 - REAR MOUNT
Fig. 15 Rear Mount
1 - BOLT
2 - REAR MOUNT BRACKET
3 - THRU-BOLT
4 - REAR MOUNT
Fig. 16 Left Mount-to-Bracket
1 - BOLT - BRACKET TO FRAME RAIL
2 - BOLT - MOUNT TO RAIL THROUGH
3 - BOLT - LEFT MOUNT TO TRANSAXLE
4 - TRANSAXLE
5 - MOUNT - LEFT
6 - BRACKET - LEFT MOUNT
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DISASSEMBLY
CAUTION: If transaxle failure has occurred, it is
necessary to flush the transaxle oil cooler and lines
to remove debris and particles that could contami-
nate and/or fail a new or rebuilt unit. (Refer to 7 -
COOLING/TRANSMISSION - STANDARD PROCE-
DURE)
NOTE: If transaxle is being overhauled (clutch
and/or seal replacement) or replaced, it is neces-
sary to perform the TCM Quick Learn Procedure.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/TRANSMISSION CONTROL MODULE -
STANDARD PROCEDURE)
NOTE: This procedure does not include final drive
(differential) disassembly.
(1) Remove input and output speed sensors.
(2) Remove three (3) solenoid/pressure switch
assembly-to-case bolts.
(3) Remove solenoid/pressure switch assembly and
gasket (Fig. 17).(4) Remove oil pan-to-case bolts (Fig. 18).
(5) Remove oil pan (Fig. 19).
(6) Remove oil filter (Fig. 20).
(7) Turn manual valve fully clock-wise to get park
rod into position for removal.
(8) Remove valve body-to-case bolts (Fig. 21).
CAUTION: Do not handle the valve body assembly
from the manual valve. Damage can result.
Fig. 17 Solenoid/Pressure Switch Assembly and
Gasket
1 - SOLENOID/PRESSURE SWITCH ASSEMBLY
2 - GASKET
Fig. 18 Remove Oil Pan Bolts
1 - OIL PAN BOLTS (USE RTV UNDER BOLT HEADS)
Fig. 19 Remove Oil Pan
1 - OIL PAN
2 - 1/8 INCH BEAD OF RTV SEALANT
3 - OIL FILTER
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(9) Using a screwdriver, push park rod rollers
away from guide bracket (Fig. 22) and remove valve
body assembly (Fig. 23).
NOTE: Depending on engine application, some
accumulators will have two springs and others will
have one spring. The springs are color-coded
according to application and year. When disassem-
bling, mark accumulator spring location to ease
assembly.
Fig. 20 Remove Oil Filter
1 - OIL FILTER
2 - O-RING
Fig. 21 Remove Valve Body Attaching Bolts
1 - VALVE BODY ATTACHING BOLTS (18)
2 - VALVE BODY
Fig. 22 Push Park Rod Rollers from Guide Bracket
1 - PARK SPRAG ROLLERS
2 - SCREWDRIVER
3 - PARK SPRAG GUIDE BRACKET
Fig. 23 Remove Valve Body
1 - VALVE BODY
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(10) Remove underdrive and overdrive accumula-
tors (Fig. 24) (Fig. 25) (Fig. 26).
(11) Remove low/reverse accumulator snap ring
(Fig. 27).
Fig. 24 Remove Underdrive and Overdrive
Accumulators
1 - RETURN SPRING
2 - UNDERDRIVE CLUTCH ACCUMULATOR
3 - SEAL RING (2)
4 - OVERDRIVE CLUTCH ACCUMULATOR
Fig. 25 Accumulator (Underdrive)
1 - ACCUMULATOR PISTON (UNDERDRIVE)
2 - RETURN SPRINGS
3 - SEAL RING
4 - SEAL RING
Fig. 26 Accumulator (Overdrive)
1 - ACCUMULATOR PISTON (OVERDRIVE)
2 - RETURN SPRING
3 - SEAL RING
4 - SEAL RING
Fig. 27 Remove Low/Reverse Accumulator Snap
Ring
1 - SNAP RING
2 - PLUG
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(12) Remove low/reverse accumulator plug (Fig.
28).
(13) Remove low/reverse accumulator piston using
petrolatum and a suitable tool (Fig. 29).(14) Remove low/reverse accumulator (Fig. 30).
(15) Measure input shaft end play. Place transaxle
so input shaft is vertical. Set up end play set and
dial indicator as shown in (Fig. 31).Input shaft end
play should be within 0.13-0.64 mm (0.005-0.025
in.)If outside of this range, a #4 thrust plate change
is required. Record indicator reading for reference
upon reassembly.
Fig. 28 Remove Low/Reverse Accumulator Plug
(Cover)
1 - ADJUSTABLE PLIERS
2 - PLUG
Fig. 29 Remove Low/Reverse Accumulator Piston
1 - SEAL RINGS
2 - PISTON
3 - PISTON
4 - PETROLATUM
5 - SUITABLE TOOL
Fig. 30 Remove Low/Reverse Accumulator
1 - ACCUMULATOR PISTON
2 - SEAL RINGS
3 - RETURN SPRINGS
4 - (NOTE NOTCH)
Fig. 31 Measure Input Shaft End Play Using End
Play Set 8266
1 - TOOL 8266±8
2 - TOOL 8266±2
3 - TOOL C-3339
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(16) Remove oil pump-to-case bolts (Fig. 32).
CAUTION: Be sure input speed sensor is removed
before removing oil pump.
(17) Install pullers Tool C-3752 as shown in (Fig.
33).
(18) Remove oil pump assembly (Fig. 34) (Fig. 35).
(19) Remove oil pump gasket (Fig. 36).
CAUTION: If transaxle failure has occurred, the
cooler bypass valve must be replaced. Do not
re-use or attempt to clean valve.
Fig. 32 Remove Pump Attaching Bolts
1 - PUMP ATTACHING BOLTS
2 - PUMP HOUSING
Fig. 33 Install Tool C-3752
1 - PULLERS TOOL C-3752
2 - PUMP
Fig. 34 Remove Oil Pump
1 - ªPUSH INº ON INPUT SHAFT WHILE REMOVING PUMP
Fig. 35 Oil Pump Removed
1 - OIL PUMP
2 - GASKET
Fig. 36 Remove Oil Pump Gasket
1 - PUMP GASKET
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