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12 bolt big ten rear brake drum question

Discussion in 'Differential & Driveline' started by 78C10BigTen, Nov 17, 2019.

  1. 78C10BigTen

    78C10BigTen Full Access Member

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    My 78 big ten had a 12 bolt 5 lug rear that i swapped to a 10 bolt but kept my backing plates and brakes. My question is i want to swap in 6 lug axles but need to know what drums to use. Anyone have a clue? Would 6 lug drums from a 4x4 12 bolt work?
     
  2. Arkansas_V8

    Arkansas_V8 Proud Redneck

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    From what I skimmed online. As long as spline count is the same, if not swap spiders. You have both brake assemblies, see which one fits.
     
  3. 78C10BigTen

    78C10BigTen Full Access Member

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    I know i have 30 splines in it because my 12 bolt was 30 and i kept them. My issue is what drums i need to use since my big ten has different size shoes then normal. I think im gunna buy 78 k10 drums n try
     
  4. Goldie Driver

    Goldie Driver Full Access Member

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  5. 78C10BigTen

    78C10BigTen Full Access Member

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    Honestly unsure. I know big ten has 2 diff size shoes. I cant remember. I did right it down once
     
  6. 78C10BigTen

    78C10BigTen Full Access Member

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    From a few quick looks at specs on autozone if i have the big brakes, drums from a 78 k10 have the same inside diameter so maybe theyll be compatible
     
  7. bucket

    bucket Super Moderator Staff Member

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    Yeah, should be
     
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  8. 78C10BigTen

    78C10BigTen Full Access Member

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    I hope so. Im really trying to make this truck a 6 lug
     
  9. Goldie Driver

    Goldie Driver Full Access Member

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    What are you doing for the fronts ?
     
  10. 78C10BigTen

    78C10BigTen Full Access Member

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    Conversion rotors

    Screenshot_2019-06-30-22-54-14.png
     
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  11. bucket

    bucket Super Moderator Staff Member

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    What wheels do you want to run?
     
  12. 78C10BigTen

    78C10BigTen Full Access Member

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    Most likely gunna be a 15" stock ralleye 10" wide. But im looking to put these right on due to having brand new tires already on. Theyre 16" probly 7 or 8 wide.

    20180214_164052.jpg
     
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