DIFFERENTIAL SYSTEM DETAILS


  1. CONSTRUCTION


    1. Front Differential (AWD Models)


      1. A double-row tapered roller bearing is used for the front differential drive pinion bearing to reduce friction loss, thus improving fuel consumption.

      2. The center line of the front differential drive pinion is offset below the center of the ring gear, preventing it from protruding into the cabin. This helps create additional cabin space.

        A01GDRRE01
        Text in Illustration
        *1 Front Differential Drive Pinion *2 Ring Gear
        *a Center of Ring Gear *b Offset

    2. Rear Differential


      1. A double-row tapered roller bearing is used for the rear differential drive pinion bearing to reduce friction loss, thus improving fuel consumption.

        A01GDOWE01
        Text in Illustration (FD21A Type Rear Differential)
        *1 Rear Differential Drive Pinion *2 Ring Gear
        *a Lightweight Carrier *b Pre-torque Mechanism
        A01GDQVE01
        Text in Illustration (FD21AT Type Rear Differential)
        *1 Rear Differential Drive Pinion *2 Ring Gear
        *3 TORSEN Limited Slip Differential (LSD) - -
        *a Lightweight Carrier - -

    3. Pre-torque Mechanism (Models with FD21A Type Rear Differential)


      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.

        A01GE5BE01
        Text in Illustration
        *1 Pinion Gear Washer *2 Side Gear
        *3 Conical Spring *4 Side Gear Washer

    4. TORSEN LSD (Models with FD21AT Type Rear Differential)


      1. The TORSEN LSD consists of a differential case, 10 planetary gears, 2 side gears and 3 washers. The planetary gears are engaged in pairs, and each pair of planetary gears is engaged with one of the side gears. The planetary gears are supported by the holes provided in the differential case and structured to rotate while revolving around the side gear.

        A01GDPZE01
        Text in Illustration
        *1 Bolt *2 Shim
        *3 Side Washer *4 Side Gear LH
        *5 Axle Spacer *6 Washer
        *7 Side Gear RH *8 Differential Case Housing
        *9 Planetary Gear LH *10 Planetary Gear RH
        *11 Differential Case Cap - -

      2. The TORSEN LSD conducts differential limiting using friction force generated mainly between the planetary gear and differential case and between the side gear and washer when a velocity difference occurs between the left and right wheels. The friction force is proportional to the differential input torque and is generated by the reaction force between the planetary gear and side gear.

        A01GE7KE01

    5. 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 4 points: 2 at the front and 2 at the rear.

      3. A liquid-filled differential mount is used as the rear right mount to reduce vibration and noise.

        A01GDSGE01
        Text in Illustration
        *a A - A Cross Section *b B - B Cross Section
        *c C - C Cross Section - -
        A01GDTC Liquid (Non-freezing) A01GDTQ Rubber