78 BB Transmission

Discussion in 'The "Juice Box"' started by hvramesq, Sep 20, 2016.

  1. hvramesq

    hvramesq Silver Level contributor

    Hi all,

    I know the 70-72 BB transmissions are special due to their unique valve body. Is a "78 BB" (trans tag) anything special? Is it an olds/Pontiac and not a buick?

    Thanks,
     

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    hvramesq, Sep 20, 2016
    #1
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    BB will always be a Buick transmission. In 78, it went behind the 350 in the Electra and Riviera. Not the same as the 70-72 BB. Nothing special really.
     
    LARRY70GS, Sep 20, 2016
    #2
  3. hvramesq

    hvramesq Silver Level contributor


    Thanks clarifying.

    Hector
     
    hvramesq, Sep 20, 2016
    #3
  4. Ken Warner

    Ken Warner Stand-up Philosopher

    FWIW my buddy who's been rebuilding transmissions since the 70s claims the Buick TH350s have the oversize drum that holds an extra steel and friction VS the standard Chevy/Pontiac/Olds TH350s.
     
    Ken Warner, Sep 20, 2016
    #4
  5. nickthehick78

    nickthehick78 Active Member

    mine had a 77 bb code and when i blew it up and went to rebuild, the sprag blew....it had the crappy 8 element sprag, you cant upgrade to better sprag without replacing that drum....just an fyi.
     
    nickthehick78, Oct 13, 2016
    #5
  6. BRUCE ROE

    BRUCE ROE Well-Known Member

    Yes you have to swap the drum too. All my transmissions have been reconditioned and 9 element
    sprags eliminated, before failure. Bruce Roe
     
    BRUCE ROE, Oct 13, 2016
    #6

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