Dodge Dakota (R1). Manual — part 700
NOTE: The 45RFE utilizes closed loop control of
pump line pressure. The pressure readings may
therefore vary greatly but should always follow line
pressure.
Some common pressures that can be measured to
evaluate pump and clutch performance are the
upshift/downshift pressures and the garage shift
pressures. The upshift/downshift pressure for all
shifts is 120 psi. The garage shift pressure when per-
forming a N-R shift is 220 psi. The garage shift pres-
sure for the R-N and N-1 shifts is 120 psi.
DIAGNOSIS AND TESTING - AIR CHECKING
TRANSMISSION CLUTCH OPERATION
Air-pressure testing can be used to check transmis-
sion clutch operation. The test can be conducted with
the transmission either in the vehicle or on the work
bench, as a final check.
Air-pressure testing requires that the oil pan and
valve body be removed from the transmission. The
clutch apply passages are shown (Fig. 6).
NOTE: The air supply which is used must be free of
moisture and dirt. Use a pressure of 30 psi to test
clutch operation.
Apply air pressure at each port. If the clutch is
functioning, a soft thump will be heard as the clutch
is applied. The clutch application can also be felt by
touching the appropriate element while applying air
pressure. As the air pressure is released, the clutch
should also release.
DIAGNOSIS AND TESTING - CONVERTER
HOUSING FLUID LEAK
When diagnosing converter housing fluid leaks,
two items must be established before repair.
(1) Verify that a leak condition actually exists.
(2) Determined the true source of the leak.
Some suspected converter housing fluid leaks may
not be leaks at all. They may only be the result of
residual fluid in the converter housing, or excess
fluid spilled during factory fill or fill after repair.
Converter
housing
leaks
have
several
potential
sources. Through careful observation, a leak source
can be identified before removing the transmission
for repair. Torque converter seal leaks tend to move
along the drive hub and onto the rear of the con-
verter. Pump cover seal tend to run down the cover
and the inside surface of the bellhousing.
Some leaks, or suspected leaks, may be particu-
larly difficult to locate. If necessary, a Mopar®
approved dye may be used to locate a leak.
TORQUE CONVERTER LEAK POINTS
Possible sources of converter leaks are:
(1) Leaks at the weld joint around the outside
diameter weld (Fig. 7).
(2) Leaks at the converter hub weld (Fig. 7).
Fig. 6 Air Pressure Test Passages
1 - LOW REVERSE CLUTCH
2 - 4TH CLUTCH
3 - 2ND CLUTCH
4 - OVERDRIVE CLUTCH
5 - UNDERDRIVE CLUTCH
6 - REVERSE CLUTCH
Fig. 7 Torque Converter Assembly
1 - TURBINE ASSEMBLY
2 - STATOR
3 - CONVERTER HUB
4 - O-RING
5 - IMPELLER ASSEMBLY
6 - CONVERTER CLUTCH PISTON
7 - TURBINE HUB
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AUTOMATIC TRANSMISSION - 45RFE
AN
AUTOMATIC TRANSMISSION - 45RFE (Continued)
STANDARD PROCEDURE - ALUMINUM
THREAD REPAIR
Damaged or worn threads in the aluminum trans-
mission case and valve body can be repaired by the
use of Heli-Coils™, or equivalent. This repair con-
sists of drilling out the worn-out damaged threads.
Then tap the hole with a special Heli-Coil™ tap, or
equivalent, and installing a Heli-Coil™ insert, or
equivalent, into the hole. This brings the hole back to
its original thread size.
Heli-Coil™, or equivalent, tools and inserts are
readily available from most automotive parts suppli-
ers.
REMOVAL
(1) Disconnect the negative battery cable.
(2) Raise and support the vehicle
(3) Remove any necessary skid plates. (Refer to 13
- FRAMES & BUMPERS/FRAME/TRANSFER CASE
SKID PLATE - REMOVAL)
(4) Mark
propeller
shaft
and
axle
companion
flanges for assembly alignment.
(5) Remove the rear propeller shaft
(6) Remove the front propeller shaft, if necessary.
(7) Remove the engine to transmission collar (Fig.
8).
(8) Remove the exhaust support bracket from the
rear of the transmission.
(9) Disconnect and lower or remove any necessary
exhaust components.
(10) Remove the starter motor.
(11) Rotate crankshaft in clockwise direction until
converter bolts are accessible. Then remove bolts one
at a time. Rotate crankshaft with socket wrench on
dampener bolt.
(12) Disconnect wires from solenoid and pressure
switch assembly, input and output speed sensors, and
line pressure sensor.
(13) Disconnect gearshift cable from transmission
manual valve lever (Fig. 9).
(14) Disconnect transmission fluid cooler lines at
transmission fittings and clips.
(15) Disconnect the transmission vent hose from
the transmission.
(16) Support rear of engine with safety stand or
jack.
(17) Raise transmission slightly with service jack
to relieve load on crossmember and supports.
(18) Remove bolts securing rear support and cush-
ion to transmission and crossmember (Fig. 10).
(19) Remove bolts attaching crossmember to frame
and remove crossmember.
(20) Remove transfer case.
(21) Remove all remaining converter housing bolts.
(22) Carefully work transmission and torque con-
verter assembly rearward off engine block dowels.
(23) Hold torque converter in place during trans-
mission removal.
(24) Lower transmission and remove assembly
from under the vehicle.
(25) To remove torque converter, carefully slide
torque converter out of the transmission.
Fig. 8 Transmission Collar
1 - ENGINE
2 - ENGINE TO TRANSMISSION COLLAR
3 - TRANSMISSION
Fig. 9 Transmission Shift Cable
1 - SHIFT CABLE
2 - MANUAL LEVER
3 - MANUAL LEVER
AN
AUTOMATIC TRANSMISSION - 45RFE
21 - 445
AUTOMATIC TRANSMISSION - 45RFE (Continued)
DISASSEMBLY
(1) Drain fluid from transmission.
(2) Clean exterior of transmission with suitable
solvent or pressure washer.
(3) Remove the torque converter from the trans-
mission.
(4) Remove the manual shift lever from the trans-
mission.
(5) Remove the input, output, and line pressure
sensors from the transmission case (Fig. 11).
(6) Inspect the ends of the sensors for debris,
which may indicate the nature of the transmission
failure.
(7) Install Support Stand 8257 onto the transmis-
sion case (Fig. 12).
(8) Using Adapter 8266-1 from End-Play Tool Set
8266 and Dial Indicator C-3339, measure and record
the input shaft end-play (Fig. 13).
NOTE: When measuring the input shaft end-play,
two
(
stops
(
will be felt. When the input shaft is
pushed inward and the dial indicator zeroed, the
first
(
stop
(
felt when the input shaft is pulled out-
ward is the movement of the input shaft in the input
clutch housing hub. This value should not be
included in the end-play measured value and there-
fore must be recorded and subtracted from the dial
indicator reading.
Fig. 10 Rear Transmission Crossmember
1 - CROSSMEMBER
2 - REAR TRANSMISSION MOUNT
Fig. 11 Remove Input, Output, and Line Pressure
Sensors
1 - OUTPUT SPEED SENSOR
2 - LINE PRESSURE SENSOR
3 - INPUT SPEED SENSOR
Fig. 12 Install Support Stand - Tool 8257
1 - TOOL 8257
21 - 446
AUTOMATIC TRANSMISSION - 45RFE
AN
AUTOMATIC TRANSMISSION - 45RFE (Continued)
(9) Remove the bolts holding the transmission
extension/adapter housing to the transmission case.
(10) Remove the extension/adapter housing from
the transmission case.
(11) Using Alignment Plate 8261, Adapter 8266-17
from End-Play Tool Set 8266 and Dial Indicator
C-3339, measure and record the output shaft end-
play (Fig. 14).
(12) Remove the bolts holding the transmission oil
pan to the transmission case.
(13) Remove the transmission oil pan from the
transmission case.
(14) Remove the primary oil filter and the oil
cooler return filter (Fig. 15).
(15) Remove the cooler return filter bypass valve.
(16) Remove the bolts holding the valve body to
the transmission case (Fig. 16).
(17) Remove the valve body from the transmission
case.
Fig. 13 Measure Input Shaft End Play
1 - TOOL 8266
2 - TOOL C-3339
Fig. 14 Measure Output Shaft End Play
1 - TOOL 8261
2 - TOOL 8266
3 - TOOL C-3339
Fig. 15 Remove Primary Oil and Cooler Filters
1 - PRIMARY OIL FILTER
2 - COOLER RETURN FILTER
3 - COOLER RETURN FILTER BYPASS VALVE
4 - VALVE BODY
Fig. 16 Remove Valve Body Assembly
1 - VALVE BODY TO CASE BOLT (6)
AN
AUTOMATIC TRANSMISSION - 45RFE
21 - 447
AUTOMATIC TRANSMISSION - 45RFE (Continued)
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