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Thread: 11" rear drum brakes

  1. #1
    Bulltear forum member Swabie
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    11" rear drum brakes

    Anyone know if the AMC 20 backing plate bolt pattern is the same for cars and Jeeps? I am looking into going with the big brakes that came on the Jeeps for my Gremlin.

    Thanks

  2. #2
    Thank you from BT Tech Master Bulltear Forum
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    axel bolt pattern might be a problem jeep was 5 on 5-1/2

    best ever 11.669 @ 112.33 mph in 1/4 mile on 33 x 10.50 slicks and 4" lift / 7.358 @ 93.03 mph in the 1/8 mile

  3. #3
    Thank you from BT ULTIMUS MAXIMUS STATUS tufcj's Avatar
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    Backing plates are the same, drums are different. I don't know if you can get 11" drums with the 5 on 4.5" lug pattern for the gremlin.

    For nearly the same money, go to somewhere like TSM ( www.tsmmfg.com ) for a set of rear discs.

    Bob
    tufcj
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    1967 Rambler Rogue

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  4. #4
    Bulltear forum member Swabie
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    Thanks for the heads up on TSM. That is a nice option.

  5. #5
    Thank you from BT ULTIMUS MAXIMUS STATUS tufcj's Avatar
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    I have a TSM kit on the back of my CJ, combined with a 4 wheel disc master cylinder from a Corvette. Even with 37" tires it stops very well. I live about an hour from the TSM shop. I was able to pick up my kit in person, and tour their shop.

    Bob
    tufcj
    1969 AMX
    1967 Rambler Rogue

    If you need a tool and don't buy it...
    you'll eventually pay for it...
    and not have it.
    Henry Ford


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  6. #6
    Bulltear forum member Swabie
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    Bob,

    Did you have to use an after market proportioning valve? If so,
    was it fairly simple to get adjusted?

    thanks Eric

  7. #7
    Thank you from BT ULTIMUS MAXIMUS STATUS tufcj's Avatar
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    I'm using the factory disc/drum proportioning valve. I just put it together and tried it, and it worked OK. The only time I get a rear tire lock (before the front) is if it's icy. Otherwise, the bias is quite good.

    Bob
    tufcj
    1969 AMX
    1967 Rambler Rogue

    If you need a tool and don't buy it...
    you'll eventually pay for it...
    and not have it.
    Henry Ford


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  8. #8
    Bulltear forum member Swabie
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    Sounds good - that would be easier for me.

  9. #9
    Bulltear forum member New to the forum
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    Check Summit for their Ford Racing brake drums. They are 11" and have the 5 x 4.5 bolt pattern. Randy
    Last edited by Randys72jav; 01-22-2014 at 12:34 PM.

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