Jeep Grand Cherokee WK. Manual — part 1409
LOW/REVERSE SWITCH VALVE
The low/reverse switch valve allows the low/reverse clutch to be operated by either the LR/CC solenoid or the MS
solenoid.
REMOVAL
NOTE: The valve body can be removed for service without having to remove the transmission assembly.
The valve body can be disassembled for cleaning and inspection of the individual components. (Refer to 21
- TRANSMISSION/AUTOMATIC - 45RFE/VALVE BODY - DISASSEMBLY)
1. Shift transmission into PARK.
2. Raise vehicle.
3. Disconnect wires at the solenoid and pressure
switch assembly connector.
4. Position drain pan under transmission oil pan.
5. Remove transmission oil pan.
6. Remove the primary oil filter (1) from valve body.
7. Remove bolts (1) attaching valve body to transmis-
sion case.
8. Lower the valve body and work the electrical con-
nector out of transmission case.
9. Separate the valve body from the transmission.
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DISASSEMBLY
1. Remove the bolts (1) holding the solenoid and
pressure switch assembly to the valve body. Do not
remove the screws on the top of the solenoid and
pressure switch assembly.
2. Separate the solenoid and pressure switch assem-
bly from the valve body.
3. Remove the screw holding the detent spring (2)
onto the valve body.
4. Remove the detent spring (2) from the valve body.
5. Remove the TRS selector plate (1) from the valve
body and the manual valve.
6. Remove the clutch passage seals (3) from the
valve body, if necessary.
1 - TRS SELECTOR PLATE
2 - DETENT SPRING
3 - CLUTCH PASSAGE SEALS
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AUTOMATIC TRANSMISSION - 545RFE - SERVICE INFORMATION
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7. Remove the screws holding the accumulator cover onto the valve body.
8. Remove the accumulator springs and pistons (1, 6-9) from the valve body. Note which accumulator piston and
spring belong in each location.
9. Place the valve body on the bench with the transfer
plate upward.
NOTE: The valve body contains seven check balls.
The transfer plate must be placed upward to pre-
vent losing the check balls when the transfer plate
is removed from the valve body.
10. Remove the screws holding the valve body to the
valve body transfer plate.
11. Remove the transfer plate from the valve body.
Note the location of all check balls.
12. Remove the check balls from the valve body.
Valve Body Components
1 - LOW/REVERSE ACCUMULATOR
6 - OVERDRIVE ACCUMULATOR
2 - LOW/REVERSE SWITCH VALVE
7 - UNDERDRIVE ACCUMULATOR
3 - UPPER VALVE BODY
8 - 4C ACCUMULATOR
4 - MANUAL VALVE
9 - 2C ACCUMULATOR
5 - SOLENOID SWITCH VALVE
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13. Remove
the
retainers
securing
the
solenoid
switch valve (1), manual valve (2), and the low/re-
verse switch valve (3) from the valve body and
remove the associated valve and spring. Tag each
valve and spring combination with location infor-
mation to aid in assembly.
1 - SOLENOID SWITCH VALVE
2 - MANUAL VALVE
3 - LOW REVERSE SWITCH VALVE
4 - LOW REVERSE ACCUMULATOR
5 - 2ND CLUTCH ACCUMULATOR
6 - UNDERDRIVE ACCUMULATOR
7 - OVERDRIVE ACCUMULATOR
8 - 4TH CLUTCH ACCUMULATOR
9 - CHECK BALLS (7)
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