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differance in factory brake codes

Discussion in 'The Garage' started by milspecjimmy, Mar 15, 2003.

  1. milspecjimmy

    milspecjimmy 1/2 ton status

    Joined:
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    Location:
    raymond, maine
    what is the differance with these brake codes?

    JB7
    JB8
    JD7
     
  2. 70~K5

    70~K5 1/2 ton status

    Joined:
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    Location:
    sillycon valley
    [ QUOTE ]
    what is the differance with these brake codes?

    JB7
    JB8
    JD7

    [/ QUOTE ]

    From my '77 Chevy service manual.
    JB7 Front disc12.50x1.28 rear drum13.00x2.50
    JB8 Front disc12.50x1.53 rear drum13.00x3.50
    Don't have a JD7 for this year.
    In 77 K 3/4 ton came with either JB6 or JB7 depending on the GVW. 1ton K came with JB8, but 1ton C came with JB7 or JB8 depending on the GVW.
     

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