Drive Pinion Shaft Assembly
Drive Pinion Shaft AssemblyREMOVAL
1. Remove the transmission assembly from vehicle body.
2. Pull out the torque converter assembly.
3. Remove the transmission harness connector from stay.
4. Disconnect the air breather hose.
5. Remove the oil charge pipe.
6. Remove the ATF inlet and outlet pipes
7. Separate the converter case and transmission case.
8. Remove the drive pinion shaft mounting bolts, and then remove the drive pinion shaft assembly from oil pump cover.
9. Remove the oil pump cover from AT main case.
INSTALLATION
1. Assemble the drive pinion assembly to oil pump cover.
NOTE: Be careful not to bend the shim.
Tightening torque: 70 N-m (7.1 kgf-m, 51.6 ft-lb)
2. Adjust the tooth contact between drive pinion shaft assembly and the front differential side gear.
3. Join the converter case with the transmission case.
4. Install the transmission harness connector to the stay.
5. Install the ATF cooler pipe.
6. Install the oil charge pipe with O-ring.
7. Install the torque converter assembly.
8. Install the transmission assembly to the vehicle.
DISASSEMBLY
1. Flatten the lock nut tab, and then remove the lock nut while holding the rear spline part of the shaft using ST1 and ST2. Pull out the drive pinion collar.
ST1 18667AA010 HOLDER
ST2 499787700 WRENCH
ST3 499787500 ADAPTER
2. Remove the O-ring.
3. Separate the roller bearing and outer race from shaft using a press.
4. Separate the front roller bearing from the shaft using a press and the ST.
ST 498517000 REPLACER
ASSEMBLY
1. Measure the dimension "A" of the drive pinion shaft.
ST 398643600 GAUGE
2. Using a press, Press-fit the new roller bearing into the specified position.
NOTE: If excessive force is applied to roller bearing, the roller bearing will not turn easily.
3. After fitting a new O-ring to the shaft, attach the drive pinion collar to the shaft.
4. Tighten the new lock nuts using ST1, ST2 and ST3.
Use the calculation below to calculate the tightening torque.
T2 = L2/(L1 + L2.x T1
T1: 116 N-m (11.8 kgf-m, 85.6 ft-lb)
[Required torque setting]
T2: Tightening torque
L1: ST2 length 0.072 m (2.83 in)
L2: Torque wrench length
Example:
ST1 18667AA010 HOLDER
ST2 499787700 WRENCH
ST3 499787500 ADAPTER
NOTE: Attach ST2 to torque wrench as straight as possible.
5. Measure the starting torque of the bearing. Make sure the starting torque is within the specified range. If the torque is not within specified range, replace the roller bearing.
Starting torque: 7.6 - 38.1 N (0.775 - 3.88 kgf, 1. 7 - 8.6 lb)
6. Crimp the locknut in 2 locations.
7. Measure the dimension "B" of the drive pinion shaft.
ST 398643600 GAUGE
8. Calculate the thickness "t" mm (in) of the drive pinion shim.
t = 6.5 ± 0.0625 (0.2559 ± 0.0025.- (B - A)
9. Select three or less shims from following table.
INSPECTION
- Make sure that all component parts are free of scratches, holes and other faults.
- Adjust the tooth alignment.
ADJUSTMENT
1. Remove the liquid gasket from the mating surface completely.
2. Install the converter case to oil pump cover, and secure them with tightening four bolts evenly.
NOTE: Use an old gasket or aluminum washer to prevent damaging the mating surface of the housing.
Tightening torque: 41 N-m (4.2 kgf-m, 30.2 ft-lb)
3. Rotate the drive pinion a few times using ST1 and ST2.
ST1 18667AA010 HOLDER
ST2 499787700 WRENCH
4. Adjust the drive pinion and hypoid driven gear backlash.
5. Apply lead-free red dye evenly on the surface of three to four teeth of the hypoid driven gear. Rotate the drive pinion in the leftward and rightward for several times. Remove the oil pump cover, and check the tooth contact pattern.
If the teeth contact is inappropriate, adjust the backlash or thickness of the shim.
- Correct tooth contact
Check item: Tooth contact surface is slightly shifted toward the toe side under a no-load condition. (When driving, it moves towards the heel side.)
- Face contact
Check item: Backlash is too large.
Contact pattern
Corrective action: Increase the thickness of pinion height adjusting washer according to the procedures for moving the drive pinion closer to the driven gear.
- Flank contact
Check item: Backlash is too small.
Contact pattern
Corrective action: Reduce the thickness of pinion height adjusting washer according to the procedure for bringing the drive pinion away from driven gear.
- Toe contact (inside contact)
Check item: Contact area is too small.
Contact pattern
Corrective action: Reduce the thickness of pinion height adjusting washer according to the procedure for bringing the drive pinion away from driven gear.
- Heel contact (outside end contact)
Check item: Contact area is too small.
Contact pattern
Corrective action: Increase the thickness of pinion height adjusting washer according to the procedures for moving the drive pinion closer to the driven gear.
6. If tooth contact is correct, mark the retainer position and loosen it. After fitting a new O-ring and oil seal, screw in the retainer to the marked position. Tighten the lock plate with specified torque.
Tightening torque: 25 N-m (2.5 kgf-m, 18.4 ft-lb)
