It’s normal for a rear-wheel drive classic to have an uncomplicated pair of front hubs, incorporating a short stub axle to mount the hub and brake disc assembly. This rotating assembly uses a couple of bearing races to help preserve the stub axle and ensure the brake disc and hub turn smoothly. In the case of the Jaguar Mk2, each wheel bearing is a self-contained needle-roller design, which means no separate ball bearings to chase as they bounce across the garage floor.
When wheel bearings become worn, they can result in excessive noise when driving the vehicle. There may also be excessive movement, detected by waggling a raised road wheel. In some cases, this can be reduced by tightening the castle nut on the end of the stub axle, although a small amount of play when waggling a raised road wheel is essential to avoid overheating the wheel bearings
