Grand Caravan FWD V6-3.3L VIN 3 Flex Fuel (2002)
Wheel Bearing: Description and Operation
Rear
HUB AND BEARING
DESCRIPTION
The rear wheel bearing and rear wheel hub of this vehicle are a one-piece sealed unit, or hub and bearing unit type assembly (Unit III). The hub and
bearing is mounted to the center of the rear axle using 4 mounting bolts. It has five wheel mounting studs on the hub flange.
All Wheel Drive vehicles have a hub and bearing unit with a splined hole in the center of the hub for rear driveshaft stub axle acceptance.
Front Wheel Drive vehicles with antilock brakes have an internally mounted wheel speed sensor and tone wheel. This hub and bearing can be
identified by the rounded cap and molded in connector on the rear of the assembly. The sensor and tone wheel cannot be serviced separately from the
hub and bearing.
OPERATION
The hub and bearing has internal bearings that allow the hub to rotate with the tire and wheel assembly (and driveshaft on All-Wheel-Drive vehicles).
The five wheel mounting studs mount the tire and wheel assembly, and disc brake rotor or brake drum to the vehicle.
On All Wheel Drive vehicles, the splined mating of the driveshaft stub axle and hub allows the driveshaft to rotate with the hub and wheel.
Front Wheel Drive vehicles equipped with antilock brakes have a wheel speed sensor and tone wheel mounted to the rear of the hub and bearing. The
tone wheel rotates with the hub which is sensed by the wheel speed sensor.
