2003 CHRYSLER CARAVAN Service Manual

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Page 1697 of 2177

CHRYSLER CARAVAN 2003 Service Manual VALVE BODY
DESCRIPTION
The valve body assembly consists of a cast alumi-
num valve body, a separator plate, and transfer
plate. The valve body contains valves and check balls
that control fluid delive

Page 1698 of 2177

CHRYSLER CARAVAN 2003 Service Manual MANUAL VALVE
The manual valve is operated by the mechanical
shift linkage. Its primary responsibility is to send
line pressure to the appropriate hydraulic circuits
and solenoids. The valve has three

MANUAL VALVE
The manual valve is operated by the mechanical
shift linkage. Its primary responsibility is to send
line pressure to the appropriate hydraulic circuits
and solenoids. The valve has three operating ranges
or positions.
CONVERTER CLUTCH SWITCH VALVE
The main responsibility of the converter clutch
switch valve is to control hydraulic pressure applied
to the front (off) side of the converter clutch piston.
Line pressure from the regulator valve is fed to the
torque converter regulator valve, where it passes
through the valve, and is slightly regulated. The
pressure is then directed to the converter clutch
switch valve and to the front side of the converter
clutch piston. This pressure pushes the piston back
and disengages the converter clutch.
CONVERTER CLUTCH CONTROL VALVE
The converter clutch control valve controls the
back (on) side of the torque converter clutch. When
the PCM/TCM energizes or modulates the LR/CC
solenoid to apply the converter clutch piston, both
the converter clutch control valve and the converter
control valve move, allowing pressure to be applied to
the back side of the clutch.
T/C REGULATOR VALVE
The torque converter regulator valve slightly regu-
lates the flow of fluid to the torque converter.
LOW/REVERSE SWITCH VALVE
The low/reverse clutch is applied from different
sources, depending on whether low (1st) gear or
reverse is selected. The low/reverse switch valve
alternates positions depending on from which direc-
tion fluid pressure is applied. By design, when the
valve is shifted by fluid pressure from one channel,
the opposing channel is blocked. The switch valve
alienates the possibility of a sticking ball check, thus
providing consistent application of the low/reverse
clutch under all operating conditions.
REMOVAL
NOTE: If valve body is replaced or reconditioned,
the TCM Quick Learn Procedure must be per-
formed. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/TRANSMISSION CONTROL
MODULE - STANDARD PROCEDURE)(1) Disconnect battery negative cable.
(2) Disconnect gearshift cable from manual valve
lever.
(3) Remove manual valve lever from manual shaft.
(4) Raise vehicle on hoist.
(5) Remove oil pan bolts (Fig. 332).
(6) Remove oil pan (Fig. 333).
Fig. 332 Oil Pan Bolts
1 - OIL PAN BOLTS (USE RTV UNDER BOLT HEADS)
Fig. 333 Oil Pan
1 - OIL PAN
2 - 1/8 INCH BEAD OF RTV SEALANT
3 - OIL FILTER
RS41TE AUTOMATIC TRANSAXLE21 - 251
VALVE BODY (Continued)
ProCarManuals.com

Page 1699 of 2177

CHRYSLER CARAVAN 2003 Service Manual (7) Remove oil filter (Fig. 334).
(8) Remove the valve body-to-transaxle case bolts
(Fig. 335).
NOTE: To ease removal of the valve body, turn the
manual valve lever fully clockwise to low or first
gea

Page 1700 of 2177

CHRYSLER CARAVAN 2003 Service Manual (1) Remove manual shaft seal (Fig. 338).
(2) Remove Transmission Range Sensor retaining
screw (Fig. 339).(3) Remove Manual Shaft/Rooster Comb and
Transmission Range Sensor (Fig. 340).
(4) Remove 2/4 A

Page 1701 of 2177

CHRYSLER CARAVAN 2003 Service Manual (5) Remove 2/4 Accumulator components as shown
in (Fig. 342).
(6) Remove Valve Body to Transfer Plate screws
(Fig. 343).(7) Invert assembly and remove Transfer Plate
(Fig. 344). Beware of loose check

Page 1702 of 2177

CHRYSLER CARAVAN 2003 Service Manual (9) Remove the overdrive clutch (#5) check valve
(Fig. 346)
(10) Remove separator plate (Fig. 347).(11) Remove thermal valve (Fig. 348).
(12) Remove check balls (Fig. 349).
NOTE: Tag all valve/spring

Page 1703 of 2177

CHRYSLER CARAVAN 2003 Service Manual Fig. 349 Ball Check Location
1 - (#4) BALL CHECK LOCATION
2 - (#2) BALL CHECK LOCATION
3 - RETAINER4 - (#3) BALL CHECK LOCATION
5 - LOW/REVERSE SWITCH VALVE
6 - T/C LIMIT VALVE
Fig. 350 Remove Dual Re

Page 1704 of 2177

CHRYSLER CARAVAN 2003 Service Manual (15) Remove remaining retainers as shown in (Fig.
352).(16) Remove valves and springs as shown in (Fig.
353).
NOTE: Refer to Valve Body Cleaning and Inspection
for cleaning procedures.
ASSEMBLY
NOTE:

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