automatic transmission fluid CHRYSLER CARAVAN 2002 Workshop Manual

SOLENOID SWITCH VALVE
The solenoid switch valve controls line pressure
from the LR/CC solenoid. In one position, it allows
the low/reverse clutch to be pressurized. In the other,
it directs line pressure to the converter control and
converter clutch valves.
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 TCM energizes or modulates the LR/CC solenoid
to apply the converter clutch piston, both the con-
verter 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
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. 341).
(6) Remove oil pan (Fig. 342).
Fig. 341 Oil Pan Bolts
1 - OIL PAN BOLTS (USE RTV UNDER BOLT HEADS)
Fig. 342 Oil Pan
1 - OIL PAN
2 - 1/8 INCH BEAD OF RTV SEALANT
3 - OIL FILTER
21 - 294 41TE AUTOMATIC TRANSAXLERS
VALVE BODY (Continued)
ProCarManuals.com

(2) Install transaxle oil filter (Fig. 386). Inspect
the o-ring and replace if necessary.
(3) Ensure the transaxle oil pan and transaxle
case sealing surfaces are clean and dry. Install an
1/8º bead of MopartSilicone Rubber Adhesive Seal-ant to the oil pan and install (Fig. 387). Torque oil
pan-to-transaxle case bolts (Fig. 388) to 19 N´m (165
in. lbs.).
(4) Lower vehicle.
(5) Connect transmission range sensor connector.
(6) Install manual valve lever to manual shaft.
(7) Install gearshift cable to manual valve lever.
(8) Connect battery negative cable.
(9) Fill transaxle with MopartATF +4 Transmis-
sion fluid. (Refer to 21 - TRANSMISSION/TRANS-
AXLE/AUTOMATIC - 41TE/FLUID - STANDARD
PROCEDURE)
Fig. 385 Valve Body Attaching Bolts
1 - VALVE BODY ATTACHING BOLTS (18)
2 - VALVE BODY
Fig. 386 Oil Filter
1 - OIL FILTER
2 - O-RING
Fig. 387 Oil Pan
1 - OIL PAN
2 - 1/8 INCH BEAD OF RTV SEALANT
3 - OIL FILTER
Fig. 388 Oil Pan Bolts
1 - OIL PAN BOLTS (USE RTV UNDER BOLT HEADS)
RS41TE AUTOMATIC TRANSAXLE21 - 307
VALVE BODY (Continued)
ProCarManuals.com

(19) Install battery thermal shield and clutch cable
eyelet (Fig. 91).(20) Connect battery cables.
(21) Check transaxle fluid and engine coolant lev-
els. Adjust if necessary. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/MANUAL/FLUID - STANDARD
PROCEDURE)
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 3.46
2nd 2.07 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 3.53
Overall Top Gear 3.12 2.66
Fig. 91 Battery Thermal Shield
1 - BATTERY THERMAL SHIELD
RST850 MANUAL TRANSAXLE21 - 343
T850 MANUAL TRANSAXLE (Continued)
ProCarManuals.com

ADJUSTMENT - DIFFERENTIAL SIDE GEAR
END PLAY
Measure side gear end play: Insert feeler gauges
180É apart between differential side gear and thrust
washer as shown in (Fig. 124). Measurement taken
here applies to both sides. Side gear end play should
be between 0.025-0.152 mm (0.001-0.006 in.). If clear-
ance is greater than 0.152 mm (0.006 in.), install a
thicker thrust washer (both sides). If clearance is less
than 0.025 mm (0.001), install a thinner thrust
washer (both sides). Refer to (Fig. 125) for available
side gear shim thicknesses.
If end play measurement indicates a thrust washer
change is necessary, the differential must be disas-
sembled. (Refer to 21 - TRANSMISSION/TRANS-
AXLE/MANUAL/DIFFERENTIAL - DISASSEMBLY)
FLUID
STANDARD PROCEDURE
STANDARD PROCEDURE - FLUID LEVEL
CHECK
NOTE: For proper fluid level check intervals, (Refer
to LUBRICATION & MAINTENANCE/MAINTENANCE
SCHEDULES - DESCRIPTION)
The fluid required in this transaxle is Mopart
ATF+4 (Automatic Transmission FluidÐType 9602).
Use of substitute fluids may result in improper
transaxle operation and/or failure.
(1) Raise vehicle on hoist.(2) Remove transaxle fill plug (Fig. 126).
(3) Inspect fluid level. Fluid should be within 1/8º
below fill hole. Add MopartATF+4 (Automatic Trans-
mission FluidÐType 9602) as neccessary.
(4) Install fill plug, ensuring it is properly seated.
(5) Lower vehicle.
Fig. 124 Side Gear End Play Measurement
1 - FEELER GAUGE
Fig. 125 Available Side Gear Thrust Washers
1 - (PLAIN) 0.79-0.84 mm (0.031-0.033 in.)
2 - ( TRIANGLE) 0.91-0.97 mm (0.036-0.038 in.)
3 - (SQUARE) 1.04-1.10 mm (0.041-0.043 in.)
4 - (DIAMOND) 1.17-1.22 mm (0.046-0.048 in.)
Fig. 126 Transaxle Fill Plug
1 - FILL PLUG
2 - END COVER
21 - 358 T850 MANUAL TRANSAXLERS
DIFFERENTIAL (Continued)
ProCarManuals.com

STANDARD PROCEDURE - FLUID DRAIN AND
FILL
NOTE: For proper fluid change intervals, (Refer to
LUBRICATION & MAINTENANCE/MAINTENANCE
SCHEDULES - DESCRIPTION)
The fluid required in this transaxle is Mopart
ATF+4 (Automatic Transmission FluidÐType 9602).
Use of substitute fluids may result in improper
transaxle operation and/or failure.
FLUID DRAIN
(1) Raise vehicle on hoist.
(2) Remove transaxle drain plug (Fig. 127) and
drain fluid into suitable container.
(3) Install drain plug and torque to 23 N´m (17 ft.
lbs.).
FLUID FILL
(1) Remove transaxle fill plug (Fig. 128).
(2) Add 2.4-2.7L (2.5-2.9 qts.) of MopartATF+4
(Automatic Transmission FluidÐType 9602) until
fluid is within 1/8º below fill hole.
(3) Install fill plug, ensuring it is properly seated.
(4) Lower vehicle.
GEARSHIFT BOOT
REMOVAL
(1) Remove gearshift knob by pushing down and
rotating1¤4-turn clockwise (Fig. 129).
Fig. 127 Transaxle Drain Plug
1 - TRANSAXLE DRAIN PLUG
2 - DIFFERENTIAL COVER
Fig. 128 Transaxle Fill Plug
1 - FILL PLUG
2 - END COVER
Fig. 129 Gearshift Knob Removal/Installation
1 - GEARSHIFT KNOB
2 - GEARSHIFT LEVER
RST850 MANUAL TRANSAXLE21 - 359
FLUID (Continued)
ProCarManuals.com