DODGE RAM SRT-10 2006 Service Repair Manual

36. Using moderate pressure, press down and hold
(near indicator) reverse clutch disc (2) with screw-
driver or suitable tool and zero dial indicator (1).
When releasing pressure, indicator should
advance 0.005-0.010 inches as clutch pack
relaxes.
37. Apply 30 psi (206 kPa) air pressure to the reverse
clutch hose on Pressure Fixture 8391. Measure
and record reverse clutch pack measurement in
four (4) places, 90° apart.
38. Take average of four measurements and compare
with reverse clutch pack clearance specification.
The reverse clutch pack clearance is 0.89-1.37
mm (0.035-0.054 in.).Select the proper reverse
clutch snap ring to achieve specifications.
39. To complete the assembly, reverse clutch and
overdrive clutch must be removed.
40. Install the number 2 needle bearing (1).
41. Install the underdrive shaft assembly (1).

42. Install the number 3 thrust washer (1) to the
underdrive shaft assembly (2). Be sure five tabs
are seated properly.
43. Install the number 3 thrust plate (3) to the bottom
of the overdrive shaft assembly (1). Retain with
petrolatum or transmission assembly gel (2).
44. Install the overdrive shaft assembly (1).

45. Reinstall overdrive and reverse clutch.Recheck-
ing these clutch clearances is not necessary.

SENSOR-INPUT SPEED
DESCRIPTION
The Input (1) and Output (2) 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, thoughitscoilisexcitedbyrotationofthe
rear planetary carrier lugs. The TCM interprets this information as outputshaftrpm.
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 transmis-
sion.
3. Remove the wiring connector from the input speed
sensor.
NOTE: The speed sensor bolt has a sealing patch
applied from the factory. Be sure to reuse the
same bolt.
4. Remove the bolt holding the input speed sensor to
the transmission case.
5. Remove the input speed sensor from the transmis-
sion case.

INSTALLATION
1. Install the input speed sensor (1) into the transmis-
sion case.
NOTE: Before installing the speed sensor bolt, it
will be necessary to replenish the sealing patch on
the bolt using MOPAR
Lock & Seal Adhesive.
2. Install the bolt to hold the input speed sensor into
the transmission case. Tighten the bolt to 9 Nꞏm
(80 in.lbs.).
3. Install the wiring connector onto the input speed
sensor
4. Verify the transmission fluid level. Add fluid as nec-
essary.
5. Lower vehicle.

SENSOR-VARIABLE LINE PRESSURE
DESCRIPTION
The line pressure sensor (2) is mounted on the top of
the valve body, next to the pressure control solenoid
(1).
The TCM utilizes a closed-loop system to control
transmission line pressure. The system contains a
variable force style solenoid, the Pressure Control
Solenoid. 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 monitors the transmission
line pressure and completes the feedback loop to the
TCM. The TCM uses this information to adjust its con-
trol 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 cal-
culates the torque input to the transmission 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
positions. This is done to ensure consistent shift quality. During all other operation, the actual line pressure is com-
pared to the desired line pressure and adjustments are made to the pressurecontrol solenoid duty cycle.
REMOVAL
1. Remove the valve body from the transmission.
(Refer to 21 - TRANSMISSION/TRANSAXLE/AU-
TOMATIC - 42RLE/VALVE BODY - REMOVAL)
2. Remove the electrical connectors from the pres-
sure control solenoid (1) and the line pressure sen-
sor (2).
3. Remove the screws (6) holding the pressure con-
trol solenoid (1) and line pressure sensor (2) to the
valve body.
4. Remove the pressure control solenoid and line
pressure sensor from the valve body.

INSTALLATION
1. Install the pressure control solenoid (1) and line
pressure sensor (2) into the valve body.
2. Install the screws (6) to hold the pressure control
solenoid (1) and line pressure sensor (2) to the
valve body.
3. Install the electrical connectors to the pressure
control solenoid (1) and the line pressure sensor
(2).
4. Install the valve body into the transmission. (Refer
to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC
- 42RLE/VALVE BODY - INSTALLATION)

PUMP-OIL
DESCRIPTION
The oil pump is located in the pump housing inside
the bell housing of the transmission case. The oil
pump assembly consists of an inner (3) and outer (2)
gear, a housing (1), and a cover that also serves as
the reaction shaft support (6).
OPERATION
As the torque converter rotates, the converter hub rotates the inner and outer gears. As the gears rotate, the clear-
ance between the gear teeth increases in the crescent area, and creates a suction at the inlet side of the pump.
This suction draws fluid through the pump inlet from the oil pan. As the clearance between the gear teeth in the
crescent area decreases, it forces pressurized fluid into the pump outletand to the valve body.
DISASSEMBLY
1. Remove the reaction shaft support bolts.
2. Remove the reaction shaft support (2) from the
pump housing (1).

3. Remove the pump gears (2, 3) and check for wear
and damage on pump housing (1) and gears (2, 3).
4. Re-install the gears and check clearances.
5. Measure the clearance between the outer gear (1)
and the pump pocket (2). Clearance should be
0.089-0.202 mm (0.0035-0.0079 in.).
6. Measure clearance between outer gear and cres-
cent. Clearance should be 0.060-0.298 mm
(0.0023-0.0117 in.).
7. Measure clearance between inner gear and cres-
cent. Clearance should be 0.093-0.385 mm
(0.0036-0.0151 in.).
8. Position an appropriate piece of Plastigage across
both pump gears.
9. AlignthePlastigagetoaflatareaonthereaction
shaft support housing.
10. Install the reaction shaft to the pump housing.
Tighten the bolts to 28 Nꞏm (250 in. lbs.).
11. Remove bolts and carefully separate the housings. Measure the Plastigage following the instructions supplied.
12. Clearance between outer gear side and the reaction shaft support should be 0.020-0.046 mm (0.0008-0.0018
in.). Clearance between inner gear side and the reaction shaft support should be 0.020-0.046 mm (0.0008-
0.0018 in.).

ASSEMBLY
1. Assemble oil pump as shown
2. Install and torque reaction shaft support-to-oil pump
housing bolts to 28 Nꞏm (250 in. lbs.) torque.