rear disc conversion Options

[Amanda66]

Will the rear disc brakes on a 92 Celica fit on my 97?

[Galcobar]

The hub is the piece upon which the rotor and wheel are mounted, which contains the bearing. On FWD cars, the rear hubs are only attached to the axle carrier (usually called that even though there's no axle).

A new hub is not necessary. However, you have to remove and replace the hub from the axle carrier in order to switch from the drum brake backing plate to the disc brake backing plate. This requires you to purchase a new O-ring for the hub.

Rear disc brakes on Toyotas use a drum-in-rotor design, where a small drum brake operated only by the e-brake handle is integrated into the rear disc. The hardware for the parking brake is mounted to a backing plate. You have to swap over the parking brake hardware and the cable (the e-brake cable from full drum brakes doesn't match the cable used on rear discs) as well as the rotor and caliper.

The hub is also the source of the difference between a fifth-gen and a sixth-gen centrebore. The rotor and the wheels are centre mounted, meaning the centre hole slides snugly over the hub. The fifth-gen hub is 54 mm in diametre, while the sixth-gen hub is 55 mm. Thus the hole in a fifth-gen rotor is 1 mm too small to fit onto a sixth-gen hub.