Dodge Dakota (R1). Manual — part 715
(23) Install the reverse clutch pack into the input
clutch retainer (Fig. 75).
(24) Install the reverse reaction plate into the
input clutch retainer.
(25) Install the reverse reaction plate selective
snap-ring into the input clutch retainer.
(26) Mount a dial indicator to the assembly, push
down on the clutch discs, pull up on the reaction
plate to ensure the plate is properly seated and zero
the indicator against the reverse clutch discs (Fig.
79). Apply 20 psi of air pressure to the reverse clutch
and record the dial indicator reading. Measure and
record Reverse clutch pack measurement in four (4)
places, 90° apart. Take average of four measurements
and compare with Reverse clutch pack clearance
specification. The correct clutch clearance is 0.81-1.24
mm (0.032-0.049 in.). Adjust as necessary. Install the
chosen snap-ring and re-measure to verify selection.
(27) Remove the reverse clutch pack from the
input clutch retainer.
(28) Install the number 2 bearing onto the under-
drive hub with flat side up/forward with petroleum
jelly.
(29) Install the underdrive hub into the input
clutch retainer.
(30) Install the number 3 bearing into the over-
drive hub with the flat side up/forward with petro-
leum jelly.
(31) Install the overdrive hub into the input clutch
retainer.
(32) Install the number 4 bearing into the reverse
hub with flat side up/forward with petroleum jelly.
(33) Install the reverse hub into the input clutch
retainer.
(34) Install the complete reverse clutch pack.
(35) Install the reverse reaction plate and snap-
ring.
(36) Push up on reaction plate to allow reverse
clutch to move freely.
INPUT SPEED SENSOR
DESCRIPTION
The Input and Output Speed Sensors are two-wire
magnetic pickup devices that generate AC signals as
rotation occurs. They are mounted in the left side of
the transmission case and are considered primary
inputs to the Transmission Control Module (TCM).
OPERATION
The Input Speed Sensor provides information on
how fast the input shaft is rotating. As the teeth of
the input clutch hub pass by the sensor coil, an AC
voltage is generated and sent to the TCM. The TCM
interprets this information as input shaft rpm.
The Output Speed Sensor generates an AC signal
in a similar fashion, though its coil is excited by rota-
tion of the rear planetary carrier lugs. The TCM
interprets this information as output shaft rpm.
The TCM compares the input and output speed
signals to determine the following:
• Transmission gear ratio
• Speed ratio error detection
• CVI calculation
The TCM also compares the input speed signal and
the engine speed signal to determine the following:
• Torque converter clutch slippage
• Torque converter element speed ratio
REMOVAL
(1) Raise vehicle.
(2) Place a suitable fluid catch pan under the
transmission.
(3) Remove the wiring connector from the input
speed sensor (Fig. 80).
(4) Remove the bolt holding the input speed sensor
to the transmission case.
(5) Remove the input speed sensor from the trans-
mission case.
INSTALLATION
(1) Install the input speed sensor into the trans-
mission case.
(2) Install the bolt to hold the input speed sensor
into the transmission case. Tighten the bolt to 11.9
N·m (105 in.lbs.).
Fig. 79 Measuring Reverse Clutch Clearance
1 - TOOL C-3339
2 - REVERSE CLUTCH PACK
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AUTOMATIC TRANSMISSION - 45RFE
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INPUT CLUTCH ASSEMBLY (Continued)
(3) Install the wiring connector onto the input
speed sensor
(4) Verify the transmission fluid level. Add fluid as
necessary.
(5) Lower vehicle.
LINE PRESSURE (LP) SENSOR
DESCRIPTION
The TCM utilizes a closed-loop system to control
transmission line pressure. The system contains a
variable force style solenoid, the Pressure Control
Solenoid, mounted on the side of the solenoid and
pressure switch assembly. The solenoid is duty cycle
controlled by the TCM to vent the unnecessary line
pressure supplied by the oil pump back to the sump.
The system also contains a variable pressure style
sensor, the Line Pressure Sensor, which is a direct
input to the TCM. The line pressure solenoid moni-
tors the transmission line pressure and completes the
feedback loop to the TCM. The TCM uses this infor-
mation to adjust its control of the pressure control
solenoid to achieve the desired line pressure.
OPERATION
The TCM calculates the desired line pressure
based upon inputs from the transmission and engine.
The TCM calculates the torque input to the trans-
mission and uses that information as the primary
input to the calculation. The line pressure is set to a
predetermined value during shifts and when the
transmission is in the PARK and NEUTRAL posi-
tions. This is done to ensure consistent shift quality.
During all other operation, the actual line pressure is
compared to the desired line pressure and adjust-
ments are made to the pressure control solenoid duty
cycle.
REMOVAL
(1) Raise vehicle.
(2) Place a suitable fluid catch pan under the
transmission.
(3) Remove the wiring connector from the line
pressure sensor (Fig. 81).
(4) Remove the bolt holding the line pressure sen-
sor to the transmission case.
(5) Remove the line pressure sensor from the
transmission case.
INSTALLATION
(1) Install the line pressure sensor into the trans-
mission case.
(2) Install the bolt to hold the line pressure sensor
into the transmission case. Tighten the bolt to 11.9
N·m (105 in.lbs.).
(3) Install the wiring connector onto the line pres-
sure sensor
(4) Verify the transmission fluid level. Add fluid as
necessary.
(5) Lower vehicle.
Fig. 80 Input Speed Sensor
1 - OUTPUT SPEED SENSOR
2 - LINE PRESSURE SENSOR
3 - INPUT SPEED SENSOR
Fig. 81 Line Pressure Sensor
1 - OUTPUT SPEED SENSOR
2 - LINE PRESSURE SENSOR
3 - INPUT SPEED SENSOR
AN
AUTOMATIC TRANSMISSION - 45RFE
21 - 505
INPUT SPEED SENSOR (Continued)
LOW/REVERSE CLUTCH
DISASSEMBLY
(1) Remove the inner overrunning clutch snap-ring
from the low/reverse clutch retainer (Fig. 82).
(2) Remove the outer low/reverse reaction plate
flat snap-ring (Fig. 82).
(3) Remove the low/reverse clutch and the over-
running clutch from the low/reverse clutch retainer
as an assembly (Fig. 82).
(4) Separate the low/reverse clutch from the over-
running clutch.
Fig. 82 Low/Reverse Clutch Assembly
1 - SNAP-RING (SELECT)
8 - SEAL
2 - REACTION PLATE
9 - BELLEVILLE SPRING
3 - DISC
10 - RETAINER
4 - PLATE
11 - SNAP-RING
5 - L/R CLUTCH RETAINER
12 - OVERRUNNING CLUTCH
6 - SEAL
13 - SNAP-RING
7 - PISTON
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AUTOMATIC TRANSMISSION - 45RFE
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(5) Remove the overrunning clutch snap-ring (Fig.
83).
(6) Remove the spacer from the overrunning clutch
(Fig. 83).
(7) Separate the inner and outer races of the over-
running clutch (Fig. 83).
(8) Remove the overrunning clutch lower snap-ring
(Fig. 83).
(9) Using Spring Compressor 8285 and a suitable
shop press (Fig. 84), compress the low/reverse piston
Belleville spring and remove the split retaining ring
holding the Belleville spring into the low/reverse
clutch retainer.
(10) Remove
the
low/reverse
clutch
Belleville
spring
and
piston
from
the
low/reverse
clutch
retainer. Use 20 psi of air pressure to remove the pis-
ton if necessary.
CLEANING
Clean the overrunning clutch assembly, clutch cam,
and low-reverse clutch retainer. Dry them with com-
pressed air after cleaning.
INSPECTION
Inspect condition of each clutch part after cleaning.
Replace the overrunning clutch roller and spring
assembly if any rollers or springs are worn or dam-
aged, or if the roller cage is distorted, or damaged.
Replace the cam if worn, cracked or damaged.
Replace the low-reverse clutch retainer if the
clutch race, roller surface or inside diameter is
scored, worn or damaged.
ASSEMBLY
(1) Check the bleed orifice to ensure that it is not
plugged or restricted.
(2) Install a new seal on the low/reverse piston.
Lubricate the seal with Mopar® ATF +4, type 9602,
prior to installation.
(3) Install the low/reverse piston into the low/re-
verse clutch retainer.
(4) Position the low/reverse piston Belleville spring
on the low/reverse piston.
(5) Using Spring Compressor 8285 and a suitable
shop press (Fig. 84), compress the low/reverse piston
Belleville spring and install the split retaining ring
to hold the Belleville spring into the low/reverse
clutch retainer.
(6) Install the lower overrunning clutch snap-ring
(Fig. 83).
(7) Assemble the inner and outer races of the over-
running clutch (Fig. 83).
(8) Position the overrunning clutch spacer on the
overrunning clutch.
(9) Install the upper overrunning clutch snap-ring
(Fig. 83).
(10) Assemble and install the low/reverse clutch
pack into the low/reverse clutch retainer (Fig. 82).
(11) Install the low/reverse reaction plate into the
low/reverse clutch retainer (Fig. 82). The reaction
Fig. 83 Overrunning Clutch
1 - SNAP-RING
2 - OUTER RACE
3 - OVERRUNNING CLUTCH
4 - SPACER
Fig. 84 Compress Low/Reverse Belleville Spring
Using Tool 8285
1 - PRESS
2 - TOOL 8285
3 - BELLEVILLE SPRING
AN
AUTOMATIC TRANSMISSION - 45RFE
21 - 507
LOW/REVERSE CLUTCH (Continued)
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