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Rear Brake Identification

Discussion in 'Intermediate CJ-5 and CJ-6 Tech' started by Alex Perny, Jun 12, 2019.

  1. Jun 12, 2019
    Alex Perny

    Alex Perny New Member

    St. Petersburg
    Jun 12, 2019
    I just picked up a '73 CJ5 that one of the previous owners stripped all...and i mean all of the rear brake hardware off with the only exception being the backing plates. How do I tell if these are 11" or 10" drums that I need to rebuild?

    Additionally, the front axle was swapped with a 78 Dana 30 with disc brakes.
  2. Jun 13, 2019

    sterlclan Member Sponsor

    exploring the...
    Feb 21, 2009
    Should be 11 inch on a 73 measure across the backing plate where the drum would ride should give some idea
  3. Jun 13, 2019

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
    Aug 10, 2003
    Yes, a '73 should have the 11'x2" Bendix brakes from the factory. Look at the TSM here http://oljeep.com/gw/74_tsm/9-BrakesWheels.pdf at figs. 9-22 and 9-23. The diameter of the brakes is from shoe surface to opposite shoe surface. You can see where the shoes would ride on the backing plates. Loking at the backing plates, there will be little plateaus where the steel backing of the shoes rides; the shoe material is about 1/4" out beyond those.

    It will be difficult to find some of the pieces you will need to put these back together. There's no current aftermarket source for the parking brake strut and lever, and maybe the shoe guide plate. They would be reused, since they don't wear out.

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