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Technical GM 3-spd stick with O.D. in a '40 Ford.

Discussion in 'Traditional Hot Rods' started by Gary Addcox, Mar 19, 2015.

  1. Gary Addcox
    Joined: Aug 28, 2009
    Posts: 2,530

    Gary Addcox
    ALLIANCE MEMBER

    Does anyone know of a '40 Ford with SBC and a GM 3-speed with overdrive ? I don't want to chop my frame all to Hell, so the O.D. is a possible solution. Thanks for any help and info.
     
  2. joel
    Joined: Oct 10, 2009
    Posts: 2,485

    joel
    ALLIANCE MEMBER

    If you're ok with removing the torque box and replacing it with bolted in plates ( aka Chassis Engineering ), you may only have to trim a little for solenoid on the OD housing. That trans is not real strong; the syncro drums in the trans will not tolerate spirited shifts under hard acceleration. You might be OK with a small V8 and the stock column shift linkage. I had one of those in my avatar in '66 (not OD ) and it cleared the torque box IIRC, but I couldn't work out the clutch linkage before I was called away by my Unckel Sam.
     
  3. patterg2003
    Joined: Sep 21, 2014
    Posts: 865

    patterg2003

    The 39 guy likes this.
  4. treb11
    Joined: Jan 21, 2006
    Posts: 3,958

    treb11
    ALLIANCE MEMBER

    T5 might be a cleaner solution
     

  5. LOU WELLS
    Joined: Jan 24, 2010
    Posts: 2,791

    LOU WELLS
    ALLIANCE MEMBER
    from IDAHO

    I DID ONE BACK IN THE LAST CENTURY AND USED THE SAGINAW OD. TRANSMISSION WITH FULL SYNCHRO ON THE COLUMN. THE CENTER OF THE CROSSMEMBER NEEDS MODIFIED AND A BULGE FOR THE SOLENOID BUT YOU CAN RETAIN THE WISH BONE IN STOCK UN SPLIT FORM. CLUTCH LINKAGE FROM THE O1A BRACKET TO A SWIVEL CHAIN LINK WORKED GREAT AND I COULD NOT BREAK THE TRANS WITH A 365 HORSE F.I. 327 IN MY YOUTH!
     
  6. 302GMC
    Joined: Dec 15, 2005
    Posts: 7,877

    302GMC
    Member
    from Idaho

    ^^^^^^^^^^^^^^
    I watched him try to break it ... all it would ever do was get 24 MPG ....
     
    LOU WELLS likes this.
  7. 51box
    Joined: Aug 31, 2005
    Posts: 1,099

    51box
    Member
    from MA

    Look for an early 80's c10 2wd, they had an a-833 4spd over drive.
    1st 3.09 2nd 1.67 3rd 1.00 4th .73 OD
    Stronger then T-5
     
    stillrunners likes this.
  8. 40Standard
    Joined: Jul 30, 2005
    Posts: 5,963

    40Standard
    Member
    from Indy

    I've put a few Muncie's 4 speeds into 40's. not a bad fit, not much cutting, ran a hyd clutch set up
     
    40fordtudor likes this.
  9. Bam.inc
    Joined: Jun 25, 2012
    Posts: 660

    Bam.inc
    Member
    from KS

    Btt...good ideas?
     
  10. TagMan
    Joined: Dec 12, 2002
    Posts: 6,300

    TagMan
    ALLIANCE MEMBER

    I put an A833 3-speed + OD in my '36 Ford coupe and there wasn't a whole lot of trimming necessary. It could go back to stock fairly easily.

    T5 would be the easiest, but wouldn't have the strength of the A833.
     
  11. Were you able to use the stock shifter for the a-833 or build one? Picture? I'm putting one in my 34, but I have the transmission out of a van, so it has alarge bracket that bolts to tailshaft and back of main case, and the shifter is straight and at least 2 feet tall.
     
    Last edited: Mar 26, 2015
  12. Reggie
    Joined: Aug 25, 2003
    Posts: 1,701

    Reggie
    ALLIANCE MEMBER

    Lee Pratt's '40 coupe has a SBC and a '57 Chevy 3-speed OD. He was able to put that small tranny in without any modification to the '40's crossmember. As with a '57, he used front motor mounts and side bellhousing mounts so that the transmission is suspended off of the bell housing with no mounts. It works for the tri-5s and I've followed Lee cross country many times with that set up.
    In my '36 cabriolet, I adapted a '57 ford 3-speed/OD to the chevy. I did have to trim out the front 3 inches of the torque box (and box it in) to allow clearance.
     
  13. The Sag was a good transmission and still is if it is not loose as a goose.

    So let me guess here you converted the banjo to open drive or ???? I am interested in your bygone century build. ;)
     
  14. I agree with the A-833. I run one in my F-100 behind my Hemi and have on in waiting for my 36 project. You will never regret making that choice. They are double Tough, compact (next to a T-5) and use a Hurst shifter that we all know to be Correct for any early Ford.
    The Wizzard
     
  15. The 39 guy
    Joined: Nov 5, 2010
    Posts: 3,541

    The 39 guy
    Member

    I installed a chevy 3 speed behind a 283 in a 40 coupe back in the mid seventies. I modified the top of the torque box a little for extra clearance. I used a Hurst floor shifter (because they were cool). If I remember correctly I modified the clutch and brake pedal assembly so that the clutch pedal was pinned to the shaft in such a way that the
     

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