2006 DODGE RAM SRT-10 Service Repair Manual

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Page 3489 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual RELAY-TRANSMISSION CONTROL
DESCRIPTION
The relay is supplied fused B+ voltage, energized by the TCM, and is used to supply power to the solenoid pack
when the transmission is in normal operating mode.

Page 3490 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual SENSOR-TRANSMISSION RANGE
DESCRIPTION
The Transmission Range Sensor (TRS) is part of the solenoid module, which is mounted to the top of the valve
body inside the transmission.
The Transmission Range

Page 3491 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual ASSEMBLY-TRANSMISSION SOLENOID/TRS
DESCRIPTION
The transmission solenoid/TRS assembly is internal to
the transmission and mounted on the valve body
assembly. The assembly consists of six solenoids tha

ASSEMBLY-TRANSMISSION SOLENOID/TRS
DESCRIPTION
The transmission solenoid/TRS assembly is internal to
the transmission and mounted on the valve body
assembly. 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 solenoid is located on the
side of the solenoid/TRS assembly. 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 controlled by
line pressure and the position of the manual valve in the valve body. All thesolenoids are contained within the
Solenoid and Pressure Switch Assembly. The solenoid and pressure switch assembly contains one additional sole-
noid, 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 ener-
gizes or operates the solenoids individually by grounding the return wireof 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 operating state. The result is an apply or releaseof a frictional element.
The MS and UD solenoids are normallyapplied to allow transmission limp-inin the event of an electrical 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 pressure switch error occurs.
PRESSURE SWITCHES
The TCM relies on five pressure switches to monitor fluid pressure in the L/R, 2C, 4C, UD, and OD hydraulic cir-
cuits. The primary purpose of these switches is to help the TCM detect when clutch circuit hydraulic failures occur.
The switches close at 23 psi and open at 11 psi, and simply indicate whether or not pressure exists. The switches
are continuously monitored by the TCM for the correct states (open or closed) in each gear as shown in the fol-
lowing charts 45RFE PRESSURE SWITCH STATES and 545RFE PRESSURE SWITCH STATES :
45RFE PRESSURE SWITCH STATES

Page 3492 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual GEAR L/R 2C 4C UD OD
ROP OP OP OP OP
P/NCL OP OP OP OP
1STCL* OP OP CL OP
2NDOP CL OP CL OP
2ND PRIMEOP OP CL CL OP
DOP OP OP CL CL
FOURTHOP OP CL OP CL
*L/R is closed if output speed is below 100 rpm

Page 3493 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 2. Remove the bolts (1) holding the transmission sole-
noid/TRS assembly onto the valve body.
3. Separate the transmission solenoid/TRS assembly
from the valve body.
INSTALLATION
1. Place TRS selector

Page 3494 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual SENSOR-TRANSMISSION TEMPERATURE
DESCRIPTION
The transmission temperature sensor is a thermistor that is integral to the Transmission Range Sensor (TRS).
OPERATION
The transmission temperature sensor i

Page 3495 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual BODY-VALVE
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 control fluid delivery to the

Page 3496 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 7 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

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