Oil Pump Housing
Oil Pump HousingREMOVAL
1) Remove the transmission assembly from the vehicle.
2) Pull out the torque converter clutch assembly.
3) Remove the input shaft.
4) Lift up the lever on the rear side of transmission harness connector, and then remove it from the stay.
5) Remove the inhibitor switch connector from the stay.
6) Remove the oil charge pipe.
7) Remove the ATF cooler inlet pipe and outlet pipe.
8) Separate the converter case and transmission case.
9) Separate the transmission case and extension case section.
10) Remove the reduction drive gear.
11) Remove the reduction driven gear.
12) Loosen the oil pump housing mounting bolts.
13) Place two wooden blocks on the workbench, and stand the transmission case with the rear end facing down.
NOTE:
^ Be careful not to scratch the rear mating surface of the transmission case.
^ Check the height of the wooden blocks to avoid damaging the parking rod and drive pinion that are protruding from the mating surface.
14) Remove the oil pump housing and adjusting thrust washer.
INSTALLATION
1) Secure the oil pump housing with two nuts and a bolt.
Tightening torque:
42 Nm (4.3 kgf-m, 31.0 ft-lb)
2) Install the converter case assembly to the transmission case assembly.
3) Install the reduction driven gear.
4) Install the reduction drive gear.
5) Connect the transmission case with the extension case.
6) Insert the inhibitor switch connector and transmission harness connector onto the stay.
7) Install the ATF cooler pipe.
8) Install the oil charge pipe together with an Oring.
9) Apply ATF to the O-ring, insert the input shaft while rotating the shaft slowly by hand, and check the amount of protrusion.
NOTE:
Use new O-rings.
Normal protrusion A:
50 - 55 mm (1.97 - 2.17 in)
10) Install the torque converter clutch assembly.
11) Install the transmission assembly to the vehicle.
DISASSEMBLY
OIL PUMP COVER
1) Remove the four seal rings.
2) Remove attachment bolts, then remove the oil pump cover by lightly tapping the end of the stator shaft.
3) Remove the oil pump inner rotor and outer rotor.
OIL SEAL RETAINER
1) Remove the oil seal retainer.
2) Remove the O-ring.
3) Remove the oil seal from the oil seal retainer.
ASSEMBLY
OIL PUMP COVER
1) Install the oil pump rotor assembly to oil pump housing.
2) Align both pivots with the pivot holes of the cover, and then install the oil pump cover while being careful not to apply excessive force to the pivots.
Tightening torque:
25 Nm (2.5 kgf-m, 18.4 ft-lb)
3) After assembling, turn the oil pump shaft to check for smooth rotation of rotor.
4) Apply Vaseline to the oil seal retainer and seal rings, and install them. After installing, adjust the tooth contact with the drive pinion backlash.
NOTE:
^ Use a new seal ring.
^ There are two types of seal rings, and they are identified by color. Install at the proper positions by referring to the figure.
OIL SEAL RETAINER
1) Apply ATF to the two oil seals and install them to the oil seal retainer using the ST.
NOTE:
^ Use a new oil seal.
^ Pay attention to the orientation of the oil seal.
ST 499247300 INSTALLER
2) Apply ATF to the O-ring and attach it to the oil seal retainer. Install the seal to the oil pump housing bore.
NOTE:
Use new O-rings.
3) Install the oil seal retainer being careful not to damage the oil seal lip, and secure it using three bolts.
Tightening torque:
7 Nm (0.7 kgf-m, 5.2 ft-lb)
INSPECTION
1) Check the seal ring and oil seal for breaks and damage.
2) Check other parts for dents or faults.
3) Oil pump rotor assembly selection
(1) Tip clearance
Install the inner rotor and outer rotor to the oil pump. With rotor gears facing each other, measure the crest-to-crest clearance.
Tip clearance:
0.02 - 0.15 mm (0.0008 - 0.0059 in)
(2) Side clearance
Set a depth gauge to oil pump housing, then measure the oil pump housing-to-rotor clearance.
Side clearance:
0.02 - 0.04 mm (0.0008 - 0.0016 in)
(3) If the depth and side clearance are out of specification, replace the oil pump rotor assembly.
Check the total end play and adjust it to be within specifications.
ADJUSTMENT
1) Using the ST, measure the length "L", from the mating surface of the transmission case to the recessed portion of the high clutch drum.
ST 398643600 GAUGE
2) Using the ST, measure the length "2" from the oil pump housing mating surface to the top surface of the oil pump cover with the thrust needle bearing.
ST 398643600 GAUGE
3) Calculation of total end play
Select a suitable bearing race from the table below and adjust the clearance "C" so that it will be within 0.25 to 0.55 mm (0.0098 to 0.0217 in).
C = (L + G) - l
4) After completing the total end play adjustment, insert the bearing race into the high clutch race. Apply Vaseline, and install the thrust needle bearing to the oil pump cover.
5) After correctly installing the gasket to the case mating surface, carefully install the oil pump housing assembly.
NOTE:
^ Use a new gasket.
^ Be careful to avoid hitting the drive pinion against the inside of case.
6) Install both parts with dowel pins aligned. Make sure there is no clearance at the mating surface.