10" x 2 1/2" rear drum brakes

Brakes, Steering & Suspension

  1. 1968340S

    1968340S Well-Known Member

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    Will 10" x 2 1/2" rear brake drum with 2 1/2" shoes fit on 1966 Satellite. Comes stock with 10" x 1 3/4" drum and shoes. These were given to me. The drum seems to fit ok.
     
  2. oldkimmer

    oldkimmer FBBO Gold Member FBBO Gold Member

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    U will need to change the backing plates on the rear end to match ur brakes and drums. Kim
     
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    • 1968340S

      1968340S Well-Known Member

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      What is the deference between the two. I thought it would just be the width. Just asking...don't know.
      I purchased the brake hardware kit and it came with different length pins for the springs that keep the shoes in place?
       
    • R413

      R413 Well-Known Member

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      The backing plates are specific to the diameter and width of the shoes. The top center pin length is the difference for width in the backing plates. Just like the length of the hold down pins, but you can easily swap them.

      You cannot use any 10” backing plate.
       
    • Fran Blacker

      Fran Blacker FBBO Gold Member FBBO Gold Member

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      Thought the difference was axle face to where the 6 spots where the shoes seat. The pin as 413 could be different?
       
    • 1968340S

      1968340S Well-Known Member

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      That makes complete sense. thx.
       
    • Fran Blacker

      Fran Blacker FBBO Gold Member FBBO Gold Member

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      Don't know if I'm reading your answer right?
      If you laid a BP on a flat surface shoe side up. Then measure through the axle hole to flat surface a 2" brake BP would be the same as a 2.5"BP? I thought the 2.5" BP would be a 1/2" taller.
       
    • R413

      R413 Well-Known Member

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      It would depend, they could make the pin stick out further, or the could change the depth of the plate where the shoes contact the plat. Like the offset on a wheel. So I’m not sure what they changed to make it happen.

      Either way if you put the wrong with shoes on a backing plate the shoes will not line up with the top center mounting pin

      I have a pair of 67 Belvedere 10 X 2.5 backing plates off the car I can measure and photo.
       
    • Fran Blacker

      Fran Blacker FBBO Gold Member FBBO Gold Member

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      MO the BP has to have more offset to the inside because the face of the axle is always the same.
       
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      • R413

        R413 Well-Known Member

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        Yes I agree. Easy when you think about it that way. LOL
         
      • khryslerkid

        khryslerkid FBBO Gold Member FBBO Gold Member

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      • khryslerkid

        khryslerkid FBBO Gold Member FBBO Gold Member

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        I'm wondering about 1-3/4" shoes? Are they for small bolt pattern or something?
         
      • mobileparts

        mobileparts Well-Known Member

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        10" x 1 3/4" Rear Brake Shoes in the "B" body world
        Was Utilized on a factory SIX (6) cylinder....
        Very Very different Brake Drum from the "A" body....
        5 x 4 1/2 big bolt pattern vs 5 x 4 small bolt pattern,
        Very different height.
         
      • khryslerkid

        khryslerkid FBBO Gold Member FBBO Gold Member

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        That would be the 8 1/4" rears then?
         
      • 1968340S

        1968340S Well-Known Member

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        I do have 10" BP with 1 3/4" shoes. Fits top center pin perfect. Question...can 2 1/2" drum work with this. Installed the 10"x 2 1/2" drum and it fits over the outside of the BP with no rubbing. 1966 Satellite.
        Checked my 1969 Formula S Barracuda 8 3/4 rear axle with 10" x 1 3/4" drum...which sets with the drum lip inside the BP.
         
      • Fran Blacker

        Fran Blacker FBBO Gold Member FBBO Gold Member

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        Try putting a 1-3/4 BP on a rear diff with an axle in it then try to put the drum on bet wheel studs will only stick out a 1/4" to 1/2".
         
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