Register now to get rid of these ads!

buick trans info

Discussion in 'The Hokey Ass Message Board' started by mbates, Sep 6, 2011.

  1. mbates
    Joined: Apr 16, 2011
    Posts: 18

    mbates
    Member
    from illinios

    can anyone tell me bout early buick three speeds with overdrive would like to find one for my 1940 buick coupe if any were available, the rear end is a 411 n trans is low ratio also top out at 55 at 3300rpm help!!!!!!
     
  2. dirty old man
    Joined: Feb 2, 2008
    Posts: 8,902

    dirty old man
    ALLIANCE MEMBER

    I never say never, but in my 60 years of messing with cars, I never saw a Buick 3 speed with overdrive!
    Dave
     
  3. Jimmy2car
    Joined: Nov 26, 2003
    Posts: 1,707

    Jimmy2car
    Member
    from No. Cal

    Your best bet is going to be changing the rear axle ratio, I think. Like Dirty old man, I've never heard of or seen one with O/D, but stranger things have happened
     
    Last edited: Sep 6, 2011
  4. 48 Chubby
    Joined: Apr 29, 2008
    Posts: 1,014

    48 Chubby
    Member Emeritus

    I don't remember ever seeing an overdrive in any GM car with an enclosed drive line. The information I have lists the axle ratio as 4.41 to 1, and few mechanical options were available on any car built in 1940.
    If you plan to cruise the Interstate at 70, more modern drive line bits may be in your future.
     

  5. Fr. Buick
    Joined: Oct 17, 2005
    Posts: 177

    Fr. Buick
    Member

    Check out the Buick Club of America web site. It may be possible to put a later ring and pinion with better highway gears in your original rear end.

    Good luck!
     
  6. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,028

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    You can use the third member from anything through '55 models and I belive the lowest numerical available is 3.36.

    It seems to me there was a thread here on the HAMB on this very subject in recent weeks with pictures and details.

    Ray
     
  7. jville_hot_skater
    Joined: Apr 9, 2009
    Posts: 1,002

    jville_hot_skater
    Member
    from jville

    i dont know much about early buicks.
    but its still a gm car,
    maybe you can find a kit to adapt a borg t5 to it...it has a built in OD in 5th gear.
     
  8. jville_hot_skater
    Joined: Apr 9, 2009
    Posts: 1,002

    jville_hot_skater
    Member
    from jville

  9. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,028

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL



    The issue here is the torque tube driveline and coil spring rear suspension that makes swapping a transmission a much bigger deal than vehicles with an open driveline in the first place.

    Yes, a T5 or other suitable trans can be adapted to the straight 8, I am doing one now (an Aisin AX15 5 speed).......but that requires lots more work and fabrication.

    The OP apparently is looking for lower RPMs at highway cruise with minimal re-engineering of his car, hence the recommendations for a ring/pinion ratio change since no overdrive transmission exists that will merely bolt in.

    Ray
     
  10. csimonds
    Joined: Jul 24, 2009
    Posts: 546

    csimonds
    Member

  11. mbates
    Joined: Apr 16, 2011
    Posts: 18

    mbates
    Member
    from illinios

    thanks for your inputs what a great way to share info!! very happy bout honkey ass board!!
     

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.