Underdrive Planetary Gear
OVERHAUL1. INSPECT UNDERDRIVE PLANETARY GEAR PRELOAD
a. Using SST fix the U/D planetary gear assy.
SST 09387-00050
b. Using SST and a torque wrench, measure the turning torque of U/D planetary gear assy while rotating the torque wrench at 60 rpm.
SST 09387-00050
Turning torque at 60 rpm.: 2.14 - 5.40 Nm (21.8 - 55.1 kgf-cm, 0.24 - 0.61 inch lbs.)
HINT: Use a torque wrench with a fulcrum length of 160 mm (6.3 inch).
2. REMOVE FRONT PLANETARY GEAR NUT
a. Using SST, loosen the staked part of the nut.
SST 09930-00010 (09931-00010, 09931-00020), 09387-00050
b. Clamp the U/D planetary gear in soft jaw vise.
NOTICE: Be careful not to damage the differential drive pinion.
c. Using a socket wrench, remove the lock nut.
3. REMOVE CYLINDRICAL ROLLER BEARING RACE INNER
a. Using SST, remove the cylindrical roller bearing race inner.
SST 09950-00020, 09950-00030, 09950-60010 (09951-00320), 09950-40011 (09957-04010)
4. REMOVE UNDERDRIVE PLANETARY GEAR ASSY
a. Using SST and a press, remove the differential drive pinion, parking lock gear, counter driven gear with U/D planetary ring gear and front tapered roller bearing.
SST 09950-60010 (09951-00320), 09387-00050
b. Clamp the U/D planetary gear in soft jaw vise.
c. Using SST, remove the rear tapered roller bearing from the U/D planetary gear.
SST 09950-00020,09950-00030,09950-60010 (09951-00320), 09950-40011 (09957-04010)
5. REMOVE UNDERDRIVE PLANETARY RING GEAR
a. Using a snap ring pliers, remove the snap ring.
b. Remove the U/D planetary ring gear from the counter driven gear.
6. INSTALL UNDERDRIVE PLANETARY RING GEAR
a. Install a new snap ring to the outer race of the tapered roller bearing.
HINT: When replacing the bearing, also replace the counter driven gear with a new one.
b. Using a piston ring compressor, squeeze the snap ring.
c. Using SST and a press, press in the outer race of the tapered roller bearing.
SST 09950-60020 (09951-00890), 09950-70010 (09951-07100)
d. Install the U/D planetary ring gear to the counter driven gear.
e. Using a snap ring pliers, install the snap ring.
7. INSTALL UNDERDRIVE PLANETARY GEAR ASSY
a. Using a press, press the rear tapered roller bearing to the U/D planetary gear.
SST 09502-12010, 09950-60010 (09951-00260), 09950-70010 (09951-07100), 09316-20011
NOTICE: Press the bearing until it becomes flat at the bottom.
b. Install the counter driven gear with planetary ring gear to the U/D planetary gear.
c. Using SST and a press, press in the front tapered roller bearing.
SST 09502-12010, 09950-60010 (09951-00260), 09950-70010 (09951-07100), 09316-20011
NOTICE: Press the counter driven gear while rotating it.
d. Using a press, press in the parking lock gear.
SST 09502-12010, 09950-60010 (09951-00260), 09950-70010 (09951-07100), 09316-20011
NOTICE: Press the counter driven gear while rotating it.
8. INSTALL DIFFERENTIAL DRIVE PINION
a. Using a press, press the differential drive pinion.
SST 09726-40010, 09950-60010 (09951-00260), 09950-70010(09951-07100)
NOTICE: Press the counter driven gear while rotating it.
9. INSTALL CYLINDRICAL ROLLER BEARING RACE INNER
a. Using a press, press the cylindrical roller bearing race inner.
SST 09506-35010, 09950-60010 (09951-00260), 09950-70010(09951-07100)
NOTICE: Press the counter driven gear while rotating it.
10. INSTALL FRONT PLANETARY GEAR NUT
a. Clamp the U/D planetary gear in soft jaw vise.
NOTICE: Be careful not to damage the differential drive pinion.
b. Using a socket wrench, install a new lock nut.
Torque: 280 Nm (2,855 kgf-cm, 207 inch lbs.)
HINT: Use a torque wrench with a fulcrum length of 750 mm (29.53 inch).
11. INSPECT UNDERDRIVE PLANETARY GEAR PRELOAD
a. Using SST and a torque wrench, measure the turning torque of U/D planetary gear assy while rotating the torque wrench at 60 rpm.
SST 09387-00050
Turning torque at 60 rpm.: 2.14 - 5.40 Nm (21.8 - 55.1 kgf-cm, 0.24 - 0.61 inch lbs.)
HINT: Use a torque wrench with a fulcrum length of 160 mm (6.30 inch).
b. Using a pin punch and hammer, stake the lock nut.
NOTICE: Make sure that there are no cracks on the nut.