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Technical th350 cable on original model A speedometer

Discussion in 'Traditional Hot Rods' started by jeff020571, Sep 16, 2015.

  1. jeff020571
    Joined: Nov 9, 2011
    Posts: 72

    jeff020571
    Member
    from france

    Hello everybody!
    i'm keeping to built my model A hot-rod and another question is on my mind at this time.
    Since i would like to keep the interior and the dash as close to original as possible, i was wondering if it is possible to connect a th350 trans cable to the original 1930 model A speedo ? Any one knows ?
    Thanks
     
  2. My 28/9 speedo has internal threads at the speedometer I don't know of any late model speedometers that have internal threads.
     
  3. Check with papa nic on Fordbarn,seems to know Model A speedos.
     
  4. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 6,124

    scrap metal 48
    Member

    If you use the original model A cable, the transmission end will fit a turbo 350 trans.. I've done it...
     
    jeff020571 likes this.
  5. DdoubleD
    Joined: Nov 18, 2009
    Posts: 225

    DdoubleD
    Member
    from Michigan

    Yes I did that exactly, threads on a model a are standard. I did have a cable made at a speedo shop. Speedo @ 60 mph = 1000 rpm. You'll have to calculate your rear axle ratio and tire size to find proper speedo gear for the trans. Not rocket science.
     
    jeff020571 likes this.
  6. I had Rusty at Speedoservice build one for me. Adapted the 47 speedometer with internal threads to the GM transmission drive.
     
  7. pooch2
    Joined: Jun 5, 2012
    Posts: 109

    pooch2
    Member
    from Australia

    Try a standard model A cable onto the TH350.

    I have 2 model A rods, one with a TH 700 and one with a T5, and running original model A oval speedos and the cables are a direct screw on fit at the gearbox end.

    Albeit, I am using an adapter that sends pulses to the computer for speed sensing .
     
    Last edited: Sep 17, 2015
  8. jeff020571
    Joined: Nov 9, 2011
    Posts: 72

    jeff020571
    Member
    from france

    Thank you all for the info's! Will help.
     

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