Dodge Sprinter. Manual — part 296
OPERATION
Signals from the input speed sensors (6, 8) (Fig.
183) are recorded in the transmission control module
(TCM) together with the wheel and engine speeds
and other information and are processed into an
input signal for electronic control.
Input speed sensor N2 (6) records the speed of the
front sun gear via the externally toothed disc carrier
of the multiple-disc clutch K1 (10) and input speed
sensor N3 (8) records the speed of the front planet
carrier via the internally toothed disc carrier of mul-
tiple-disc clutch K1 (3).
OIL PUMP
DESCRIPTION
The oil pump (2) (Fig. 184) (crescent-type pump) is
installed in the bellhousing behind the torque con-
verter and is driven by the drive flange of the torque
converter. The pump creates the oil pressure required
for the hydraulic procedures.
OPERATION
When the engine is running, the oil (Fig. 185) is
pumped through the inlet chamber (5) along the
Fig. 183 Input Speed Sensors
1 - DRIVING CLUTCH K1
2 - TRANSMISSION HOUSING
3 - DRIVING CLUTCH K1 INTERNALLY TOOTHED DISC
4 - EXCITER RING
5 - VALVE HOUSING OF SHIFT PLATE
6 - N2 INPUT SPEED SENSOR
7 - SPRING
8 - N3 INPUT SPEED SENSOR
9 - EXCITER RING
10 - DRIVING CLUTCH K1 EXTERNALLY TOOTHED DISC
Fig. 184 Oil Pump
1 - CRESCENT
2 - OIL PUMP
3 - EXTERNAL GEAR
4 - INTERNAL GEAR
5 - INLET CHAMBER
6 - PRESSURE CHAMBER
Fig. 185 Oil Pump
1 - CRESCENT
2 - OIL PUMP
3 - EXTERNAL GEAR
4 - INTERNAL GEAR
5 - INLET CHAMBER
6 - PRESSURE CHAMBER
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upper and lower side of the crescent (1) to the pres-
sure chamber (6) of the housing. The meshing of the
teeth prevents oil flowing from the delivery side to
the intake side. An external gear (3) is eccentrically
mounted in the pump housing. The external gear is
driven by the internal gear (4) which is connected to
the torque converter hub.
DISASSEMBLY
(1) Remove pump gears (1 and 2) (Fig. 186) from
pump housing.
(2) Remove the inner oil pump seal (1) (Fig. 187).
(3) Replace the outer oil pump O-ring (2) (Fig.
187).
INSPECTION
Before measuring any oil pump components, per-
form a thorough visual inspection of all the compo-
nents. If any sign of scoring, scratches, or other
damage is seen, replace the oil pump as an assembly.
SIDE CLEARANCE
Side clearance is the difference between the thick-
ness of the pump gears and the depth of the pocket
in the pump housing. Side clearance can be mea-
sured by laying a flat plate across the mounting face
of the pump housing, and measuring the distance
between the plate and the gears.
Acceptable side clearance:
• Inner gear: 0.064 mm (0.0025 in) max
• Outer gear: 0.069 mm (0.0027 in) max
TIP CLEARANCE
Tip clearance is the difference between the tip
diameters of the gear teeth and the corresponding
diameters of the pocket in the pump housing.
Tip clearance for the inner gear can be checked by
moving the inner gear into tight mesh (2) (Fig. 188)
with the outer gear as shown. Clearance between the
ID of the crescent feature of the housing and the OD
of the teeth of the inner gear (3) should then me
measured at a point 37 mm from the corner of the
crescent (1) feature, as shown below.
Acceptable tip clearance for inner gear:
• 0.85 mm (0.033 in) max
Fig. 186 Oil Pump Gears
1 - OUTER PUMP ROTOR
2 - INNER PUMP ROTOR
Fig. 187 Remove Oil Pump Seals
1 - INNER OIL SEAL
2 - OUTER OIL SEAL
Fig. 188 Oil Pump Measurement
1 - MEASURE 37MM FROM THE CORNER OF CRESCENT
2 - TIGHT MESH HERE
3 - MEASURE TIP CLEARANCE HERE
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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ASSEMBLY
(1) Install new inner oil pump seal (1) (Fig. 189)
with Seal Installer 8902-A.
(2) Replace O-ring (2) (Fig. 189).
(3) Lubricate pump gears and place in the pump
housing. Insert pump gear (1) (Fig. 190) so that the
chamfer (arrow) points towards the pump housing.
OUTPUT SHAFT BEARING
REMOVAL
(1) Raise and support vehicle.
(2) Remove the propeller shaft (Refer to 3 - DIF-
FERENTIAL & DRIVELINE/PROPELLER SHAFT/
PROPELLER SHAFT - REMOVAL).
(3) Verify that the transmission is in PARK in
order to prepare for the removal of the output shaft
nut.
(4) Remove the nut holding the propeller shaft
flange to the output shaft and remove the flange.
(5) Remove the transmission rear oil seal with a
suitable slide hammer and screw.
(6) Remove the transmission output shaft washer.
Be sure to tag the washer since it is very similar to
the geartrain end-play shim and they must not be
interchanged.
(7) Remove the transmission rear output shaft
bearing retaining ring (1) (Fig. 191).
Fig. 189 Install New Oil Pump Seals
1 - INNER OIL SEAL
2 - OUTER OIL SEAL
Fig. 190 Oil Pump Gears
1 - OUTER PUMP ROTOR
2 - INNER PUMP ROTOR
Fig. 191 Remove Rear Output Shaft Retaining Ring
1 - RETAINING RING
2 - OUTPUT SHAFT BEARING
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(8) Position Bearing Remover 9082 (1) (Fig. 192)
over the inner race of the output shaft bearing.
(9) Slide the collar (3) (Fig. 193) on the Bearing
Remover 9082 (1) downward over the fingers (3) of
the tool.
CAUTION: Verify that the geartrain end-play shim
has remained on the output shaft and against the
park gear. The shim may be adhered to the bearing
inner race. Retrieve the shim from the bearing and
install over the output shaft and against the park
gear.
(10) Remove the output shaft bearing (3) (Fig.
194).
Fig. 192 Position Remover 9082 On Bearing
1 - BEARING REMOVER 9082
2 - TRANSMISSION CASE
3 - OUTPUT SHAFT BEARING
Fig. 193 Slide Remover 9082 Collar Downward
1 - BEARING REMOVER 9082
2 - TRANSMISSION CASE
3 - COLLAR
4 - FINGERS
Fig. 194 Remove Output Shaft Bearing
1 - BEARING REMOVER 9082
2 - TRANSMISSION CASE
3 - OUTPUT SHAFT BEARING
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