1998 DODGE RAM 1500 Torque converter clutch solenoid

TRANSMISSION SOLENOID/
TRS ASSEMBLY
DESCRIPTION
The transmission solenoid/TRS assembly is inter-
nal to the transmission and mounted on the valve
body assembly (Fig. 126). The assembly consists of
six solenoids that control hydraulic pressure to the
six friction elements (transmission clutches), and the
torque converter clutch. The pressure control sole-
noid is located on the side of the solenoid/TRS assem-
bly. The solenoid/TRS assembly also contains five
pressure switches that feed information to the TCM.
OPERATION
SOLENOIDS
Solenoids are used to control the L/R, 2C, 4C, OD,
and UD friction elements. The reverse clutch is con-
trolled by line pressure and the position of the man-
ual valve in the valve body. All the solenoids are
contained within the Solenoid and Pressure Switch
Assembly. The solenoid and pressure switch assembly
contains one additional solenoid, Multi-Select (MS),
which serves primarily to provide 2nd and 3rd gear
limp-in operation.
The solenoids receive electrical power from the
Transmission Control Relay through a single wire.
The TCM energizes or operates the solenoids individ-
ually by grounding the return wire of the solenoid as
necessary. When a solenoid is energized, the solenoid
valve shifts, and a fluid passage is opened or closed
(vented or applied), depending on its default operat-
ing state. The result is an apply or release of a fric-
tional element.
The MS and UD solenoids are normally applied to
allow transmission limp-in in the event of an electri-
cal failure.The continuity of the solenoids and circuits are
periodically tested. Each solenoid is turned on or off
depending on its current state. An inductive spike
should be detected by the TCM during this test. If no
spike is detected, the circuit is tested again to verify
the failure. In addition to the periodic testing, the
solenoid circuits are tested if a speed ratio or pres-
sure switch error occurs.
Fig. 126 Transmission Solenoid/TRS Assembly
1 - PRESSURE CONTROL SOLENOID
2 - TRANSMISSION RANGE SELECTOR PLATE
3 - 23-WAY CONNECTOR
4 - SOLENOID PACK
5 - TRANSMISSION RANGE SENSOR
6 - VALVE BODY
21 - 406 AUTOMATIC TRANSMISSION - 45RFE/545RFEDR

INSTALLATION
(1) Place TRS selector plate in the PARK position.
(2) Position the transmission solenoid/TRS assem-
bly onto the valve body. Be sure that both alignment
dowels are fully seated in the valve body and that
the TRS switch contacts are properly positioned in
the selector plate
(3) Install the screws to hold the transmission
solenoid/TRS assembly onto the valve body.
(4) Tighten the solenoid assembly screws adjacent
to the arrows cast into the bottom of the valve body
first. Tighten the screws to 5.7 N´m (50 in.lbs.).
(5) Tighten the remainder of the solenoid assembly
screws to 5.7 N´m (50 in.lbs.).
(6) Install the valve body into the transmission.
TRANSMISSION
TEMPERATURE SENSOR
DESCRIPTION
The transmission temperature sensor is a ther-
mistor that is integral to the Transmission Range
Sensor (TRS).
OPERATION
The transmission temperature sensor is used by
the TCM to sense the temperature of the fluid in the
sump. Since fluid temperature can affect transmis-
sion shift quality and convertor lock up, the TCM
requires this information to determine which shift
schedule to operate in.
Calculated Temperature
A failure in the temperature sensor or circuit will
result in calculated temperature being substituted for
actual temperature. Calculated temperature is a pre-
dicted fluid temperature which is calculated from a
combination of inputs:
²Battery (ambient) temperature
²Engine coolant temperature
²In-gear run time since start-up
VALVE BODY
DESCRIPTION
The valve body consists of a cast aluminum valve
body, a separator plate, and a transfer plate. The
valve body contains valves and check balls that con-
trol fluid delivery to the torque converter clutch,
bands, and frictional clutches. The valve body con-
tains the following components (Fig. 129) and (Fig.
130):
²Solenoid switch valve
²Manual valve
²Low/reverse switch valve
²5 Accumulators
²7 check balls
OPERATION
NOTE: Refer to the Hydraulic Schematics for a
visual aid in determining valve location, operation
and design.
SOLENOID SWITCH VALVE
The Solenoid Switch Valve (SSV) controls the direc-
tion of the transmission fluid when the L/R-TCC sole-
noid is energized.
When shifting into 1st gear, a special hydraulic
sequence is performed to ensure SSV movement into
the downshifted position. The L/R pressure switch is
monitored to confirm SSV movement. If the move-
ment is not confirmed (the L/R pressure switch does
not close), 2nd gear is substituted for 1st. A DTC will
be set after three unsuccessful attempts are made to
get into 1st gear in one given key start.
MANUAL VALVE
The manual valve is a relay valve. The purpose of
the manual valve is to direct fluid to the correct cir-
cuit needed for a specific gear or driving range. The
manual valve, as the name implies, is manually oper-
ated by the driver with a lever located on the top of
the valve body. The valve is connected mechanically
by a cable to the gearshift mechanism. The valve is
held in each of its positions by a roller detent spring
(Fig. 131) that engages the ªroostercombº of the TRS
selector plate.
21 - 408 AUTOMATIC TRANSMISSION - 45RFE/545RFEDR
TRANSMISSION SOLENOID/TRS ASSEMBLY (Continued)

VALVE - DESCRIPTION, PCV............25-17
VALVE - DESCRIPTION, RWAL...........5-50
VALVE - DESCRIPTION, SOLENOID
SWITCH...........................21-398
VALVE - DESCRIPTION, TORQUE
CONVERTER DRAINBACK.............21-261
VALVE - INSPECTION, OIL PRESSURE
RELIEF.............................9-294
VALVE - INSTALLATION, CHECK..........8R-8
VALVE - INSTALLATION, FUEL
PRESSURE LIMITING.................14-61
VALVE - INSTALLATION, OIL PRESSURE
RELIEF.............................9-294
VALVE - INSTALLATION, PCV...........25-21
VALVE - INSTALLATION, RWAL...........5-51
VALVE - OPERATION, CASCADE
OVERFLOW.........................14-66
VALVE - OPERATION, CHECK............8R-8
VALVE - OPERATION, FUEL PRESSURE
LIMITING...........................14-61
VALVE - OPERATION, HIGH PRESSURE
RELIEF.............................24-48
VALVE - OPERATION, PCV..............25-19
VALVE - OPERATION, RWAL.............5-50
VALVE - OPERATION, SOLENOID SWITCH . 21-398
VALVE - OPERATION, TORQUE
CONVERTER DRAINBACK.............21-261
VALVE - REMOVAL, CHECK..............8R-8
VALVE - REMOVAL, FUEL PRESSURE
LIMITING...........................14-61
VALVE - REMOVAL, OIL PRESSURE
RELIEF.............................9-294
VALVE - REMOVAL, PCV...............25-21
VALVE - REMOVAL, RWAL..............5-51
VALVE - STANDARD PROCEDURE,
TORQUE CONVERTER DRAINBACK......21-261
VALVE BODY - ADJUSTMENTS.........21-310
VALVE BODY - ASSEMBLY......21-299,21-414
VALVE BODY - CLEANING.......21-298,21-412
VALVE BODY - DESCRIPTION....21-267,21-408
VALVE BODY - DISASSEMBLY....21-287,21-410
VALVE BODY - INSPECTION.....21-298,21-413
VALVE BODY - INSTALLATION....21-309,21-414
VALVE BODY - OPERATION......21-272,21-408
VALVE BODY - REMOVAL.......21-286,21-410
VALVE CABLE - ADJUSTMENTS,
THROTTLE.........................21-254
VALVE CABLE - DESCRIPTION,
THROTTLE.........................21-253
VALVE CORE - DESCRIPTION, SERVICE
PORT..............................24-70
VALVE CORE - INSTALLATION, SERVICE
PORT..............................24-70
VALVE CORES - REMOVAL, SERVICE
PORT..............................24-70
VALVE GUIDE SEALS - DESCRIPTION . . 9-32,9-38
VALVE GUIDES - DESCRIPTION....9-107,9-202
VALVE LASH ADJUSTMENT AND
VERIFICATION - STANDARD
PROCEDURE........................9-259
VALVE SPRINGS - DESCRIPTION....9-126,9-32,
9-38
VALVE SPRINGS - INSTALLATION . . 9-127,9-204,
9-32,9-38
VALVE SPRINGS - REMOVAL . . 9-126,9-204,9-32,
9-38
VALVE SPRINGS AND SEALS - REMOVAL . 9-260
VALVE STEM SEALS - DESCRIPTION
.....9-127,
9-203
VALVE TIMING - DESCRIPTION
...........9-76
VALVE TIMING - OPERATION
............9-76
VALVES & SEATS - DESCRIPTION,
INTAKE/EXHAUST
...........9-123,9-256,9-28
VALVES & SEATS - INSTALLATION,
INTAKE/EXHAUST
................9-124,9-30
VALVES & SEATS - REMOVAL,
INTAKE/EXHAUST
................9-124,9-29
VALVES, GUIDES AND SPRINGS -
STANDARD PROCEDURE
...............9-256
VAPOR CANISTER - DESCRIPTION
.......25-22
VAPOR CANISTER - INSTALLATION
......25-22
VAPOR CANISTER - OPERATION
.........25-22
VAPOR CANISTER - REMOVAL
..........25-22
VARIABLE BRAKE PROPORTIONING -
DESCRIPTION, ELECTRONIC
.............5-49
VARIABLE BRAKE PROPORTIONING -
OPERATION, ELECTRONIC
...............5-49VARIATION ADJUSTMENT - STANDARD
PROCEDURE, COMPASS...............8M-5
VEHICLE CERTIFICATION LABEL -
DESCRIPTION.....................Intro.-11
VEHICLE EMISSION CONTROL
INFORMATION (VECI) - DESCRIPTION . . . Intro.-2
VEHICLE IDENTIFICATION NUMBER -
DESCRIPTION......................Intro.-1
VEHICLE INFO CENTER - DESCRIPTION,
ELECTRONIC........................8M-7
VEHICLE INFO CENTER - INSTALLATION,
ELECTRONIC........................8M-9
VEHICLE INFO CENTER - OPERATION,
ELECTRONIC........................8M-7
VEHICLE INFO CENTER - REMOVAL,
ELECTRONIC........................8M-9
VEHICLE INFORMATION CENTER -
DIAGNOSIS AND TESTING,
ELECTRONIC........................8M-8
VEHICLE INFORMATION CENTER
PROGRAMMING - STANDARD
PROCEDURE, ELECTRONIC.............8M-8
VEHICLE THEFT SECURITY SYSTEM,
DIAGNOSIS AND TESTING..............8Q-3
VEHICLE THEFT/SECURITY SYSTEM -
DESCRIPTION........................8Q-1
VEHICLE THEFT/SECURITY SYSTEM -
OPERATION..........................8Q-1
VENT - INSTALLATION, BODY...........23-71
VENT - REMOVAL, BODY..............23-71
VENT GLASS - INSTALLATION, BACKLITE . 23-87
VENT GLASS - REMOVAL, BACKLITE.....23-87
VERIFICATION - SERVICE PROCEDURE,
TIMING.............................9-77
VERIFICATION - STANDARD
PROCEDURE, ENGINE TIMING..........9-167
VERIFICATION - STANDARD
PROCEDURE, TIMING.................9-299
VERIFICATION - STANDARD
PROCEDURE, VALVE LASH
ADJUSTMENT.......................9-259
VERIFICATION TEST - STANDARD
PROCEDURE.........................8O-9
VIBRATION - DIAGNOSIS AND TESTING,
TIRE NOISE OR.......................22-7
VIBRATION DAMPER - INSPECTION......9-285
VIBRATION DAMPER - INSTALLATION....9-144,
9-215,9-286,9-56
VIBRATION DAMPER - REMOVAL . . 9-144,9-215,
9-285,9-55
VIEW MIRROR - INSTALLATION, SIDE....23-42
VIEW MIRROR - REMOVAL, REAR.......23-69
VIEW MIRROR - REMOVAL, SIDE........23-41
VIEW MIRROR FLAG - INSTALLATION,
SIDE..............................23-27
VIEW MIRROR FLAG - REMOVAL, SIDE . . . 23-27
VIEW MIRROR GLASS - INSTALLATION,
SIDE..............................23-43
VIEW MIRROR GLASS - REMOVAL, SIDE . . 23-42
VIEW MIRROR SUPPORT BRACKET -
INSTALLATION, REAR.................23-70
VISCOUS CLUTCH - 5.9L DIESEL -
DESCRIPTION, FAN DRIVE..............7-52
VISCOUS CLUTCH - 5.9L DIESEL -
OPERATION, FAN DRIVE................7-52
VISCOUS CLUTCH-GAS ENGINES -
DESCRIPTION, FAN DRIVE..............7-50
VISCOUS CLUTCH-GAS ENGINES -
OPERATION, FAN DRIVE................7-50
VISCOUS FAN DRIVE - DIAGNOSIS AND
TESTING............................7-50
VISCOUS FAN DRIVE - DIAGNOSIS AND
TESTING, ELECTRONICALLY
CONTROLLED........................7-52
VISOR - INSTALLATION, SUN...........23-70
VISOR - REMOVAL, SUN...............23-70
VISOR SUPPORT - INSTALLATION, SUN . . . 23-71
VISOR SUPPORT - REMOVAL, SUN......23-70
VOLT SUPPLIES - DESCRIPTION, 5......8E-10
VOLT SUPPLIES - OPERATION, 5........8E-11
VOLTAGE DROP - STANDARD
PROCEDURE, TESTING FOR A.......8W-01-10
VOLTAGE GAUGE - DESCRIPTION
........8J-42
VOLTAGE GAUGE - OPERATION
..........8J-43
VOLTAGE POTENTIAL - STANDARD
PROCEDURE, TESTING OF
...........8W-01-9
VOLTAGE REGULATOR - DESCRIPTION
....8F-25
VOLTAGE REGULATOR - OPERATION
.....8F-25VOLTAGE TEST - STANDARD
PROCEDURE, OPEN-CIRCUIT...........8F-10
VOLUME CHECK - STANDARD
PROCEDURE, OIL PUMP..............21-387
WAIT-TO-START INDICATOR -
DESCRIPTION.......................8J-44
WAIT-TO-START INDICATOR -
OPERATION.........................8J-44
WARNING - A/C SYSTEM..............24-43
WARNING - ENGINE COOLING SYSTEM . . . 24-42
WARNING - INSTALLATION.............23-88
WARNING - REMOVAL................23-88
WARNING - SAFETY PRECAUTIONS AND
WARNINGS..........................23-1
WARNING - SAFETY PRECAUTIONS AND
WARNINGS..........................13-4
WARNING - WINDSHIELD SAFETY
PRECAUTIONS.......................23-88
WARNING, CLUTCH.....................6-1
WARNING SYSTEM - DESCRIPTION,
CHIME..............................8B-1
WARNING SYSTEM - DIAGNOSIS AND
TESTING, CHIME......................8B-3
WARNING SYSTEM - OPERATION,
CHIME..............................8B-1
WARNINGS, GENERAL..............8W-01-7
WARNINGS, RESTRAINT SYSTEM........8O-5
WARNINGS, WARNING - SAFETY
PRECAUTIONS........................23-1
WARNINGS, WARNING - SAFETY
PRECAUTIONS........................13-4
WASHER FLUID INDICATOR -
DESCRIPTION.......................8J-44
WASHER FLUID INDICATOR -
OPERATION.........................8J-44
WASHER FLUID LEVEL SWITCH -
DESCRIPTION........................8R-9
WASHER FLUID LEVEL SWITCH -
INSTALLATION......................8R-11
WASHER FLUID LEVEL SWITCH -
OPERATION..........................8R-9
WASHER FLUID LEVEL SWITCH -
REMOVAL..........................8R-10
WASHER HOSES/TUBES - DESCRIPTION . . 8R-11
WASHER HOSES/TUBES - OPERATION....8R-11
WASHER NOZZLE - DESCRIPTION.......8R-11
WASHER NOZZLE - INSTALLATION......8R-12
WASHER NOZZLE - OPERATION.........8R-12
WASHER NOZZLE - REMOVAL..........8R-12
WASHER PUMP/MOTOR - DESCRIPTION . . 8R-13
WASHER PUMP/MOTOR - INSTALLATION . 8R-14
WASHER PUMP/MOTOR - OPERATION . . . 8R-13
WASHER PUMP/MOTOR - REMOVAL.....8R-14
WASHER RESERVOIR - DESCRIPTION....8R-14
WASHER RESERVOIR - OPERATION......8R-15
WASHER SYSTEM - CLEANING, WIPER....8R-6
WASHER SYSTEM - DIAGNOSIS AND
TESTING, WIPER.....................8R-6
WASHER SYSTEM - INSPECTION, WIPER . . 8R-7
WATER DRAINING AT FUEL FILTER -
STANDARD PROCEDURES..............14-47
WATER IN FUEL SENSOR -
DESCRIPTION.......................14-66
WATER IN FUEL SENSOR - OPERATION . . . 14-66
WATER IN FUEL SENSOR - REMOVAL....14-66
WATER LEAKS - DIAGNOSIS AND
TESTING............................23-1
WATER PUMP - 5.7L - INSTALLATION.....7-63
WATER PUMP - 5.7L - REMOVAL.........7-63
WATER PUMP - 5.9L DIESEL -
CLEANING...........................7-62
WATER PUMP - 5.9L DIESEL -
DESCRIPTION........................7-62
WATER PUMP - 5.9L DIESEL -
INSPECTION.........................7-62
WATER PUMP - 5.9L DIESEL -
INSTALLATION........................7-62
WATER PUMP - 5.9L DIESEL -
OPERATION..........................7-62
WATER PUMP - 5.9L DIESEL - REMOVAL . . 7-62
WATER PUMP - 8.0L - CLEANING........7-66
WATER PUMP - 8.0L - INSPECTION.......7-66
WATER PUMP - 8.0L - INSTALLATION
.....7-66
WATER PUMP - 8.0L - REMOVAL
.........7-64
WATER PUMP - DESCRIPTION
...........7-59
WATER PUMP - DIAGNOSIS AND
TESTING
........................7-62,7-63
WATER PUMP - OPERATION
.............7-60
36 INDEXDR
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