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Technical Which manual trans behind a 392 Hemi?

Discussion in 'The Hokey Ass Message Board' started by Grims, Dec 26, 2017.

  1. Grims
    Joined: Jan 8, 2017
    Posts: 7


    What 5spd transmissions are being used/recommended behind a 392 Hemi. I am building a 30 Model A tudor sedan. Engine has mild cam, 10:1 compression, headers. I will be using it for spirited driving
    to work and on weekends. Maybe once or twice on the drag strip but mostly just driving around. I have
    a 9 inch with 3.70 lsd.
    Thanks for any input.
  2. gimpyshotrods
    Joined: May 20, 2009
    Posts: 16,015


    T56, TKO600.

    I am partial to the T56, because they are easy to find and upgrade. I even put a spare one in my Falcon.
    Hnstray likes this.
  3. Philo Beddoe
    Joined: Feb 2, 2009
    Posts: 24

    Philo Beddoe
    from Central Ca

    I'm running a TKO600 behind my Hemi using a Hot Heads trans adapter and flywheel. I have a similar engine and rear end set up. Transmission shifts smooth with no issues so far.
  4. deucendude
    Joined: Oct 31, 2008
    Posts: 456

    from norcal

    TKO600. They are hard to beat.
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  5. gobybike
    Joined: Dec 4, 2010
    Posts: 15


    I’m building a healthy 392 right now and want to row my own gears but DAMN a TKO ain’t even close to what I can afford after the hemi build bills. Even an unknown one on CL is 3k plus.

    I will be taking Gimpy’s advice and looking for a T56.

  6. jack_pine
    Joined: Jan 20, 2007
    Posts: 343

    from Motor City

    Dodge Dakota AX15 5speed. Go find 73RR on this site. He makes an adapter and can tell you what parts to buy from Rockauto.

    Sent from my SAMSUNG-SM-G870A using The H.A.M.B. mobile app
  7. Hemi Joel
    Joined: May 4, 2007
    Posts: 584

    Hemi Joel
    from Minnesota

    If a TKO is 3 grand,
    I'd get a T56 Magnum. Stronger, 6 gears, and $100 more
    donrob likes this.
  8. i ran a richmond 5spd with over drive as the first trans. after breaking first gear i stepped up to a g-force gfr-5 speed clutch assist. its the best trans i ever owned. they are not cheap but they can handle 1200hp power. i opted for the magnesium case that saves 15 pounds. i also got it full roller bearing with polished gears. they offer hundreds of gear ratio options. a conventional h-pattern shifter is offered or a inline shifter. any input spline is available. being a mopar guy i went with a 18-spline. i used a mcloud dual disc street twin clutch with a mcloud hydraulic release bearing. i rounded it out with a quick time bell housing that saves 15lbs over a small block mopar lakewood scatter shield.
    Last edited: Dec 30, 2017
  9. gimpyshotrods
    Joined: May 20, 2009
    Posts: 16,015


    Either that or get a used Camaro T56 for $800-1200. A pro rebuild from by favorite shop is $1400, $1850, $2750, depending on expected power level, topping out at 750lb-ft, at the rear wheels!
    Hnstray and chadhollem like this.

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