Rear axle gearbox [Toyota Land Cruiser J70]

Replacing the front oil seal without removing the gearbox from the car

Note: For operations on adjusting, removing and installing parts when replacing the front oil seal, see the subsection "Replacing the rear oil seal without removing the gearbox from the vehicle" section "Front axle gearbox".

1. Remove the rear propeller shaft.

2. Remove the main gear pinion flange.

3. Using a special tool, remove the oil seal, then remove the oil deflector ring.

The full article is posted on the website (www.TOYOTAMAN.ru)

4. Using the special tool, remove the front pinion bearing.



5. Remove the bearing spacer sleeve.

6. Install the new spacer sleeve and bearing.

7. Install the oil deflector ring as shown in the figure.

8. Using a drift and hammer, install the new oil seal as shown in the figure.

The depth of pressing the seal is 1.0 mm



9. Apply grease to the seal lip.



10. Install the final drive pinion flange.

11. Check the preload of the pinion bearings.

Preload (initial):

• new bearing - 1.0-1.6 Nm
• old bearing - 0.5-0.8 Nm

12. Pin the drive gear nut.

13. Connect the rear propeller shaft to the pinion flange.

14. Check the oil level in the gearbox housing. Add oil if necessary.

Removal the gearbox

1. For models with rear differential lock: perform the preliminary operations (see the relevant paragraph in the section "Rear differential lock drive").

2. Unscrew the drain plug and drain the oil from the gearbox housing.

3. Remove the axle shafts from the rear axle housing.

4. Disconnect the rear propeller shaft.

5. For models with rear differential lock: Disconnect the connectors from the lock actuator.



6. Loosen the bolts and remove the gearbox housing.

Caution: Be careful not to damage the mounting surfaces.

Installing the gearbox

1. For models with differential lock mechanism: check the operation of the lock mechanism.

a) Connect the locking mechanism drive connector and check the operation of the mechanism depending on the position of the differential lock switch.

b) After checking, lock the rear differential.

2. Install a new gasket.

3. Install the gearbox housing on the rear axle and secure it with two nuts and 10 bolts. Tighten the nuts and mounting bolts.

Tightening torque: 25 Nm.

4. For models with rear differential lock: Connect the connectors to the lock actuator.

Note:

• When connecting the breather tube from the wire bundle side to the locking mechanism hose, the depth of insertion of the tube into the hose should be 15 mm.
• It is necessary to prevent water from getting to the connector and hose.

5. Connect the rear propeller shaft to the pinion flange.

6. Install the axle shafts into the rear axle housing.

7. Install the drain plug.

8. Fill the gearbox housing with hypoid transmission oil.

9. For models with differential lock mechanism:

• a) Checking the operation of the locking mechanism.
• b) Check that the plug is in the breather tube area (above the right side frame member) not damaged or worn out.

Checking the gearbox

Note: For verification operations that are not included in this subsection, see the corresponding subsection of the section "Front axle gearbox".

1. Checking the preload of the drive gear.

Measure the preload provided by the clearance between the teeth of the driven and driving gears.

Preload (initial) - 0.5 - 0.8 Nm

2. Checking the overall preload.

a) Measure the total preload.

Total preload: Add 0.4-0.6 N·m to the preload value of the drive gear.

b) If necessary, disassemble and check the differential.

3. Checking the lateral clearance in the engagement of the axle gear.

a) Measure the side clearance in the engagement of the axle gear while holding the axle gear and the crosspiece.

Permissible gap - 0.05-0.20 mm



b) If the side clearance does not meet the standards, install a thrust washer of the required thickness.

Thrust washers thickness - 0.9; 1,0; 1,1; 1,2; 1.3 mm