Transmission Case

Transmission Case

REMOVAL

1) Remove the manual transmission assembly from the vehicle.
2) Remove the clutch release lever.
3) Remove the transfer case together with the extension case assembly.
4) Remove the bearing mounting bolt.





5) Remove the main shaft rear plate.





6) Separate the transmission case into the right and left cases by loosening the coupling bolts and nuts.





7) Remove the drive pinion shaft assembly from the left side of the transmission case.

NOTE:
Use a hammer handle, etc. to remove if too tight.





8) Remove the main shaft assembly for single-range.
9) Remove the front differential assembly.





10) Remove the differential side retainers and bearing outer races on the right and left sides.

NOTE:
Do not confuse the right and left roller bearing outer races.

11) Remove the reverse idler gear.
12) Remove the shifter fork and rod.

INSTALLATION

1) Wipe off grease, oil and dust on the mating surfaces of transmission cases with cleaning solvent.
2) Install the shifter fork and rod.
3) Select the drive pinion shim.
4) Install the differential side retainer, from which the bearing outer race and O-ring have already been removed, to the transmission case LH side.
5) Install the front differential assembly.
6) Install the main shaft assembly for single-range. Install the transmission case knock pin into the knock pin hole of needle bearing.
7) Install the drive pinion shaft assembly. Install the transmission case knock pin into the roller bearing knock pin hole.
8) Apply liquid gasket, then join the right side and left side of the case together.

Liquid gasket:
THREE BOND 1215 (Part No. 004403007) or equivalent





9) With brackets and clips as shown in the figure, tighten the seventeen bolts.

NOTE:
Match the cases together so that the drive pinion shims are not caught between the cases.

Tightening torque:
8 mm bolt
25 Nm (2.5 kgf-m, 18.4 ft-lb)
10 mm bolt
40 Nm (4.1 kgf-m, 29.5 ft-lb)





10) Tighten the taper roller bearing mounting bolts.

Tightening torque:
30 Nm (3.1 kgf-m, 22.1 ft-lb)





11) Perform backlash adjustment of the hypoid gear and preload measurement of the roller bearing.

NOTE:
Attach the ST on drive pinion assembly.

ST 18667AA020 HOLDER





12) Place the transmission with the left side of case facing downward, and put ST1 on bearing race.
13) Screw the retainer assembly from the bottom into left case using ST2. Fit the ST3 on transmission main shaft. Shift the gear into 4th or 5th, and turn the shaft several times. Screw in the retainer while rotating the ST3 until a slight resistance is felt on ST2.
This is the contact point of the hypoid gear and the drive pinion shaft. Repeat the above sequence several times to ensure the contact point.
ST1 399780104 WEIGHT
ST2 18630AA010 WRENCH COMPL RETAINER
ST3 499927100 HANDLE





14) Remove the weight, and screw in the retainer without the O-ring on the upper side, and stop at the point where a slight resistance is felt.

NOTE:
In this condition, the backlash between hypoid gear and drive pinion shaft is zero.

ST 18630AA010 WRENCH COMPL RETAINER





15) Loosen the retainer on the lower side by 3 notches, and turn the retainer on the upper side by the same amount in order to apply backlash.
16) Rotate the retainer of the upper side additionally by 1 notch in order to apply preload on taper roller bearing.
17) Temporarily attach both the upper and lower lock plates, and put marks both the retainer and lock plate for later readjustment.

NOTE:
If it is hard to install the lock plates, reverse the sides and install them.

18) Turn the transmission main shaft several times while tapping around the retainer lightly with plastic hammer.
19) Inspect and adjust backlash and tooth contact of the hypoid gear. Front Differential Assembly
20) After checking the tooth contact of the hypoid gears, remove the lock plate. Then loosen the retainer until the O-ring groove appears. Fit the O-ring into the groove and tighten the retainer into the position before it was loosened.
Install the lock plate.

NOTE:
^ When loosening the retainer, record the number of the turns made.
^ Perform this operation for both upper and lower retainers.
^ Use new O-rings.

Tightening torque:
T: 25 Nm (2.5 kgf-m, 18.4 ft-lb)





21) Select a main shaft rear plate.
22) Install the clutch release lever and bearing.
23) Install the transfer case together with the extension case assembly.
24) Install the manual transmission assembly to the vehicle.

INSPECTION

Check the transmission case for cracks, damage, or oil leaks.