DIFFERENTIAL SYSTEM


  1. OUTLINE


    1. A FD21C type rear differential is used.

    2. A pre-torque mechanism is used for the differential to improve the initial acceleration performance of the vehicle on slippery road surfaces.

      Figure 1. FD21C Type Rear Differential

      B003IEMC02
      *a Pre-torque Mechanism - -

    3. Pre-torque Mechanism


      1. The pre-torque mechanism consists of a construction in which a conical spring is provided between the side gear and the side gear washer, and a preload is applied between the side gear washer and the side gear. Because of this, when the load and speed differential are low, the balance limit between the left and right wheels can be achieved by friction produced by the sliding parts within the range of the conical spring force.

        B003J0EC02
        *1 Pinion Gear *2 Side Gear
        *3 Conical Spring *4 Side Gear Washer

    4. Differential Support


      1. A dual dampening construction, in which the differential is mounted on the suspension member via rubber mounts, is used.

      2. The rear differential is supported on the suspension member at 3 points: 2 at the front and 1 at the rear.

      3. A rear differential dynamic damper is used. The damper absorbs vibrations to achieve noise reduction.

        B003IFVC01
        *1 Rear Differential Dynamic Damper - -
        *a A - A Cross Section *b B - B Cross Section
        *c C - C Cross Section - -
        B0056SJ Rubber - -

  2. SPECIFICATION

    Differential Type FD21C
    Differential Gear Ratio 3.357
    Ring Gear Size 208 mm (8.2 in.)
    Drive Pinion No. of Gear Teeth 14
    Ring Gear No. of Gear Teeth 47
    No. of Differential Pinion 2
    Oil Type Toyota Genuine Differential Gear Oil LT
    Oil Viscosity SAE 75W-85
    Oil Grade API GL-5