Ford Pick-ups and Broncos 1987-1996 Repair Guide

Brake Disc (Rotor)



  1. Jack up the rear of the truck and support it with jackstands. Remove the wheel.
  3. Remove the caliper assembly and support it to the frame with a piece of wire without disconnecting the brake fluid hose.
  5. Remove the axle hub and rotor assembly. See Drive Train under Dana 80 rear axle.
  7. Install the rotor using the procedures found in Drive Train .


If the rotor is deeply scarred or has shallow cracks, it may be refinished on a disc brake rotor lathe. Also, if the lateral run-out exceeds 0.008 in. (0.20mm) within a 6 in. (152mm) radius when measured with a dial indicator, with the stylus 1 in. (25mm) in from the edge of the rotor, the rotor should be refinished or replaced.

A maximum of 0.020 in. (0.5mm) of material may be removed equally from each friction surface of the rotor. If the damage cannot be corrected when the rotor has been machined to the minimum thickness shown on the rotor, it should be replaced.

The finished braking surfaces of the rotor must be parallel within 0.0010 in. (0.025mm) and lateral run-out must not be more than 0.008 in. (0.20mm) on the inboard surface in a 5 in. (127mm) radius.