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Technical Gm open drive conversions available

Discussion in 'The Hokey Ass Message Board' started by wheeltramp brian, Dec 30, 2025 at 9:08 AM.

  1. wheeltramp brian
    Joined: Jun 11, 2010
    Posts: 3,357

    wheeltramp brian
    Member

  2. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 14,417

    Johnny Gee
    Member
    from Downey, Ca

  3. wheeltramp brian
    Joined: Jun 11, 2010
    Posts: 3,357

    wheeltramp brian
    Member

    Thanks for posting the pictures.
     
    49ratfink and Johnny Gee like this.
  4. brokedownbiker
    Joined: Jun 7, 2016
    Posts: 699

    brokedownbiker
    ALLIANCE MEMBER

    Great idea, I've always wondered why these weren't available.
     
    49ratfink likes this.
  5. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,536

    gimpyshotrods
    ALLIANCE MEMBER

    A grand, to keep the mediocre 3-speed.
     
    VANDENPLAS, Fogger, lumpy 63 and 6 others like this.
  6. fastcar1953
    Joined: Oct 23, 2009
    Posts: 4,156

    fastcar1953
    Member

    Why wont a modern transmission work ? I put a 5 speed behind my 235. A lot less than a grand
     
  7. Moriarity
    Joined: Apr 11, 2001
    Posts: 37,712

    Moriarity
    SUPER MODERATOR
    Staff Member

    Yeah, why would anyone want that? If you are going open drive a later 3 speed would be easy and synchro first and can be made to work with the stock shifter. Personally I think the torque tube with 3.55 gears is the way to go….
     
  8. I just went with a 3.36 in my Buick. Same transmission a d torque tube.
    It LIKES 80 mph.

    Ben
     
    VANDENPLAS and 49ratfink like this.
  9. 49ratfink
    Joined: Feb 8, 2004
    Posts: 25,070

    49ratfink
    Member
    from California

    that's a lot of money. :confused:
     
    Johnny Gee and Moriarity like this.
  10. BJR
    Joined: Mar 11, 2005
    Posts: 11,361

    BJR
    Member

    Another good product with no market to buy it.
     
    VANDENPLAS likes this.
  11. chevrod
    Joined: Sep 3, 2006
    Posts: 57

    chevrod
    Member
    from Finland

    Why ask why, its hot rodding :)
     
  12. Mr48chev
    Joined: Dec 28, 2007
    Posts: 36,040

    Mr48chev
    ALLIANCE MEMBER

    The main reason for using it is that you don't have to change the bellhousing or get and adapter to fit a Muncie pattern Transmission to the earler small chevy bolt pattern bellhousing . Trucks went to the Muncie pattern in 48 but cars didn't until 55 and 54 and earler motor monts don't jive with 55 and later six cylinder bellhousings as far as I know.
    .
     

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