Differential Assembly: Description and Operation

GENERAL INFORMATION

The type A rear axle for vehicles with TC-SST has been established.
The type B rear axle for vehicles with CVT has been established.
The rear axle has the following features:
[Type A]

- The wheel bearing is a unit ball bearing (double-row angular contact ball bearing) which incorporates the oil seals and is highly resistant to thrust loads.

- The driveshaft incorporates lightweight and compact EBJ-ETJ type constant velocity joints.

- The rear driveshaft spline diameter on the wheel-side has been increased, improving torsional strength.

- The protector cover of magnetic encoder is equipped to driveshaft.

- The mechanical type limited slip differential has been equipped.

- Lead-free grease for the constant velocity joint is adopted.

- Hexavalent chromium is eliminated from the dust cover material.

- The number of parts is reduced by integrating the magnetic encoder for ABS wheel speed detection into the wheel bearing.

- The mechanical type limited slip differential has been equipped.
[Type B]

- The wheel bearing is a unit ball bearing (double-row angular contact ball bearing) which incorporates the oil seals and is highly resistant to a thrust load.

- The number of parts has been reduced by integrating the magnetic encoder for ABS wheel speed detection into the wheel bearing.

- ETJ-type on the differential side and EUJ-type on the hub side constant velocity joints are featured in the driveshaft.

- Adoption of the electronic control AWD optimizes the size of the driveshaft constant velocity joint and achieves the weight saving.

- Lead-free grease for the constant velocity joint has been adopted.

- Hexavalent chromium has been eliminated from the dust cover material.

- The electronic control coupling installed in front of the differential, which transfers the drive force to the rear wheels by pushing the clutch in according to the strength of the magnetic attraction generated by the magnetic coil (For more details, refer to Electronic Control AWD).

- Aluminum differential carrier is used for weight saving.

- Optimization of the hypoid gear ratio reduces the torque loss.

- Adoption of the hypoid gear with the same teeth height realizes the downsizing and increases the strength of the coupling.

NOTE:

EBJ (High Efficiency Compact Birfield Joint): the lighter and smaller constant velocity joint compared with the conventional BJ has been achieved by adopting the eight small balls.
ETJ (High Efficiency Compact Tripod Joint): the lighter and smaller constant velocity joint compared with the conventional TJ has been installed.
EUJ (High Efficiency Compact Undercut Joint): The lighter and smaller constant velocity joint compared with the conventional BJ has been achieved by adopting the eight small balls.

CONSTRUCTION DIAGRAM

[Type A]





[Type B]