Dodge dakota 2002 Service Manual page 2328

DR
OIL PUMP FRONT SEAL
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 567
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 567
OUTPUT SPEED SENSOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 567
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 567
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 567
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 567
OVERDRIVE SWITCH
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 568
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 568
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 568
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 569
PISTONS
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 569
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 569
PLANETARY GEARTRAIN
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 571
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 571
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . 573
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . 573
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . 573
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . 573
SHIFT MECHANISM
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 574
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 574
SOLENOID SWITCH VALVE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 574
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 574
SOLENOIDS
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 574
AUTOMATIC TRANSMISSION -
45RFE/545RFE
DESCRIPTION
The 45RFE/545RFE automatic transmissions is a
sophisticated, multi-range, electronically controlled
transmission which combines optimized gear ratios
for responsive performance, state of the art efficiency
features and low NVH. Other features include driver
adaptive shifting and three planetary gear sets to
provide wide ratio capability with precise ratio steps
for optimum driveability. The three planetary gear
sets also make available a unique alternate second
gear ratio. The primary 2nd gear ratio fits between
1st and 3rd gears for normal through-gear accelera-
tions. The alternate second gear ratio (2prime) allows
smoother 4-2 kickdowns at high speeds to provide
2nd gear passing performance over a wider highway
cruising range.
The hydraulic portion of the transmission consists
of the transmission fluid, fluid passages, hydraulic
valves, and various line pressure control components.
AUTOMATIC TRANSMISSION - 45RFE/545RFE
OPERATION
TORQUE CONVERTER
DESCRIPTION
OPERATION
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 580
INSTALLATION
TRANSMISSION CONTROL RELAY
DESCRIPTION
OPERATION
TRANSMISSION RANGE SENSOR
DESCRIPTION
OPERATION
TRANSMISSION SOLENOID/TRS ASSEMBLY
DESCRIPTION
OPERATION
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 583
INSTALLATION
TRANSMISSION TEMPERATURE SENSOR
DESCRIPTION
OPERATION
VALVE BODY
DESCRIPTION
OPERATION
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 585
DISASSEMBLY
CLEANING
INSPECTION
ASSEMBLY
INSTALLATION
The primary mechanical components of the trans-
mission consist of the following:
• Three multiple disc input clutches
• Three multiple disc holding clutches
• Five hydraulic accumulators
• Three planetary gear sets
• Dual Stage Hydraulic oil pump
• Valve body
• Solenoid pack
The TCM is the "heart" or "brain" of the electronic
control system and relies on information from vari-
ous direct and indirect inputs (sensors, switches, etc.)
to determine driver demand and vehicle operating
conditions. With this information, the TCM can cal-
culate and perform timely and quality shifts through
various output or control devices (solenoid pack,
transmission control relay, etc.).
TRANSMISSION IDENTIFICATION
Transmission identification numbers are stamped
on the left side of the case just above the oil pan
sealing surface (Fig. 1). Refer to this information
when ordering replacement parts. A label is attached
to the transmission case above the stamped numbers.
. . . . . . . . . . . . . . . . . . . . . . . . . . 575
. . . . . . . . . . . . . . . . . . . . . . . . 575
. . . . . . . . . . . . . . . . . . . . . . . . . . 579
. . . . . . . . . . . . . . . . . . . . . . . . 580
. . . . . . . . . . . . . . . . . . . . . . . . 581
. . . . . . . . . . . . . . . . . . . . . . . . . . 581
. . . . . . . . . . . . . . . . . . . . . . . . 581
. . . . . . . . . . . . . . . . . . . . . . . . . . 581
. . . . . . . . . . . . . . . . . . . . . . . . 582
. . . . . . . . . . . . . . . . . . . . . . . . . . 582
. . . . . . . . . . . . . . . . . . . . . . . . 583
. . . . . . . . . . . . . . . . . . . . . . . . 583
. . . . . . . . . . . . . . . . . . . . . . . . . . 583
. . . . . . . . . . . . . . . . . . . . . . . . 584
. . . . . . . . . . . . . . . . . . . . . . . . . . 585
. . . . . . . . . . . . . . . . . . . . . . . . 586
. . . . . . . . . . . . . . . . . . . . . . . . . . . 588
. . . . . . . . . . . . . . . . . . . . . . . . . 588
. . . . . . . . . . . . . . . . . . . . . . . . . . . 590
. . . . . . . . . . . . . . . . . . . . . . . . 590
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