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Technical Model a torque tube upside down?

Discussion in 'Traditional Hot Rods' started by 49 fordge, Jan 13, 2019.

  1. 49 fordge
    Joined: Nov 28, 2011
    Posts: 25

    49 fordge
    Member
    from Floral, Ar

    Think the torque tube on my model a is upside down.. the cut out for the speedo drive is on the top. Is this right? Why would it be turned over? It was this away when I got it. Should I turn it over?
     
  2. seb fontana
    Joined: Sep 1, 2005
    Posts: 5,864

    seb fontana
    Member
    from ct

    Supposed to be on top
     
  3. 49 fordge
    Joined: Nov 28, 2011
    Posts: 25

    49 fordge
    Member
    from Floral, Ar

    Thanks! This is my first car with an enclosed driveshaft. And I thought it was supposed to be on bottom.
     
  4. Hnstray
    Joined: Aug 23, 2009
    Posts: 10,602

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    It's an old used car dealers trick....turning it upside down runs the odometer in reverse...the miles keep lowering.....:D
     
    Last edited: Jan 13, 2019
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  5. PhredH
    Joined: Feb 28, 2015
    Posts: 55

    PhredH

    Unless I am misunderstanding the original post, I would disagree with #2 post.
    On a stock Model A the cutout for the speedometer "turtle" faces the ground (as does the turtle) with the speedometer cable entering the turtle from the passenger side of the car. The rear radius rods also bolt to the front of the torque tube through a boss on the lower front of the tube.

    If the rear suspension has been modified, an upside down torque tube may not be important.

    HTH
    Peace, Phred
     
  6. woodiewagon46
    Joined: Mar 14, 2013
    Posts: 1,387

    woodiewagon46
    Member
    from New York

    PhredH, is correct. The cut out for the speedometer gear cap, sometimes called the "turtle" should be on the bottom. The speedometer cable exits the passenger side and routs up the inside right of the firewall thru the gas tank channel to the dash speedometer. If its facing up it's wrong. During Model A production there were seven different speedometer gear caps used. The front mounting point for your rear radius rods should be down for the radius rods to fit, that should be your first clue.
     
  7. You're almost right Ray, but the proper way to do it is to remove the torque tube and swap it end for end.
     
    dwollam and Hnstray like this.
  8. 49 fordge
    Joined: Nov 28, 2011
    Posts: 25

    49 fordge
    Member
    from Floral, Ar

    So, at this point I have the engine and tranny out of the car. Should I rotate it to the right position? I’m guessing somebody in the past just put it together wrong. Is this what you guys are thinking?
     
  9. rusty valley
    Joined: Oct 25, 2014
    Posts: 704

    rusty valley
    Member

    you must be using some kinda different radius rod set up or your question would be answered by looking at it. the radius rods attach to the tube also, big boss stickin down behind the turtle, both are on the bottom if you are stock. has this thing been all apart? its possible to have the center section backwards too, then it goes really good backwards. drain plug on the bottom? look in the fill plug, gear should be on pass side ? i think, some will catch me if wrong
     
  10. 49 fordge
    Joined: Nov 28, 2011
    Posts: 25

    49 fordge
    Member
    from Floral, Ar

    I haven’t owned the car long but it has definitely had some sub par mechanic work in the past. I’m pretty sure the center section is correct.
    I think from what I’m reading, somebody in the past has had the torque tube off and when they put it back they have it 180 off. The boss for the radius arms is on the top also. So If I’m correct I should be able to unbolt the radius arms, remove the bolts from th flange of the torque tube to center section and rotate it 180degs and reassembled.
    Am I correct here?
     
  11. rusty valley
    Joined: Oct 25, 2014
    Posts: 704

    rusty valley
    Member

    yeah, turn it over. they would have to have bent the rods to get them mounted on top, they are kinda wimpy but i'm not sure they will bend that far by hand. torch, or slip a long pipe pipe over them and see how it goes. in a perfect world they should match rite up to the bolt hole and make a nice triangle, as thats what keeps the rear end all square and happy
     
  12. Lazy Jake
    Joined: Feb 4, 2008
    Posts: 59

    Lazy Jake
    Member

    There is also a “notch” at the back of the torque tube that matches up with a notch in the banjo to allow oil to drain back into the banjo. This goes to the bottom as oil seeks it’s own level. So, turtle, radius rod attachment point and, notch all down.


    Sent from my iPad using The H.A.M.B. mobile app
     
    ydopen likes this.

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