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Technical Ford transmission

Discussion in 'Traditional Hot Rods' started by Harley32, Feb 12, 2021.

  1. Harley32
    Joined: Oct 28, 2017
    Posts: 26

    Harley32

    Has anyone used a ford 3sp overdrive transmission behind a flathead they was from the 80 ford truck from what i gather[​IMG]


    Sent from my iPhone using The H.A.M.B. mobile app
     
    53 effie likes this.
  2. I had one in a 79 F150, 2:75 rear. Geared way too high. I would use at least a 3:73 rear. Made
    in Mexico. Came apart with low miles. I would look for T-5.
     
    Crankshaft likes this.
  3. Harley32
    Joined: Oct 28, 2017
    Posts: 26

    Harley32

  4. sloppy jalopies
    Joined: Jun 29, 2015
    Posts: 4,779

    sloppy jalopies
    Member

    Most of those trannies would let you interchange most of the guts... ask the boys here as to what fits or works best.... '39 trannies are more $... but if you must change the cluster gear anyway, putting '39 guts in an older box isn't that bad. $...
     

  5. ronzmtrwrx
    Joined: Sep 9, 2008
    Posts: 647

    ronzmtrwrx
    Member

    The trans you have pictured is a TREMEC T170 RTS that came in 84-87 F150’s. It’s a different transmission than what was in the 79 pickup. Quite a few folks have used the T170 behind flatheads. Do a search. Also there are some threads over on The Ford Barn about that setup. I’m putting one behind my Flathead in my 39.
     
    Last edited: Feb 12, 2021
  6. LOL any transmission in any Ford made after about 1980 had a Mexican made transmission. :D

    I got an idea that the transmission would hold up fine to 1o0 HP. One of the fellas had one in an F truck behind the stock 6 cylinder and it held up as long as the truck did.
     
    Hnstray likes this.
  7. MeanGene427
    Joined: Dec 15, 2010
    Posts: 1,804

    MeanGene427
    Member
    from Napa

    I have one of the car versions, and even found the rare Hurst shifter made for it, thought I might try it in my 57 Sedan Delivery. They are not strong like the regular 4-speed toploaders, and would be a cruising-only choice, no dropped clutches etc. Probably comparable to a Munchie lol ;)
     
  8. rusty valley
    Joined: Oct 25, 2014
    Posts: 2,574

    rusty valley
    Member

    popular with the model A crowd because they fit without hacking the center cross member. also, some one makes the closed drive adapter for the rear
     
    deathrowdave and stillrunners like this.
  9. Harley32
    Joined: Oct 28, 2017
    Posts: 26

    Harley32

  10. Fabulous50's
    Joined: Nov 18, 2017
    Posts: 322

    Fabulous50's
    Member
    from Maine

    I have one apart right now.

    This is an iron case side mount overdrive (smod). 20210207_163310.jpg 20210207_163303.jpg

    What you have is the same internals but is called a "top mount overdrive" or TOD
     
    53 effie and stillrunners like this.
  11. Yep - they made a cast iron OD first based on the Ford top loader 4 speed - can't believe a built flat head could tear on up.....then came the aluminum TOD - still strong enough for a banger or flathead. ford overdrive top loader.JPG ford tod 4 overdrive.JPG ford overdrive top loader.JPG ford tod 4 overdrive.JPG
     
    chevyfordman and ronzmtrwrx like this.
  12. rusty valley
    Joined: Oct 25, 2014
    Posts: 2,574

    rusty valley
    Member

    I want one !!!
     
    chevyfordman likes this.
  13. goldmountain
    Joined: Jun 12, 2016
    Posts: 2,934

    goldmountain

    I'm trying to locate one of those. Found one at the swap meet years ago but didn't get it because I didn't know what it was. Been looking for another for a long time.
     
  14. Fabber McGee
    Joined: Nov 22, 2013
    Posts: 1,020

    Fabber McGee
    Member

    Keep an eye out at your local "you pull it" yard. They made a lot of them and those old F150's should be coming in all the time. Bronco's used them too.
     
    stillrunners likes this.
  15. FalconMan
    Joined: Sep 9, 2008
    Posts: 1,354

    FalconMan
    ALLIANCE MEMBER
    from Minnesota

    I just bought one last week here in the HAMB ads ... gonna put it in my 37 truck :)
     
    stillrunners likes this.
  16. Fabber McGee
    Joined: Nov 22, 2013
    Posts: 1,020

    Fabber McGee
    Member

    Tremec T-176 is the same basic transmission without the overdrive, still top shift. Came in Jeeps and has the short tail shaft to couple with a transfer case. I have rounded up 3 of them in various conditions for my 29 sedan. One sat with a couple inches of water in it, one has a broken reverse idler gear from rocking the Jeep back and forth in a mud hole (and speed shifting I imagine), third one the guy said it needs bearings.

    I have a warmed up B engine from H & H, not installed yet and 21" wheels (with Coker radials) . I think direct drive in 4th gear will be fine for my car on Alaskan roads, no freeways here to merge onto. If I recall correctly the chart said about 2800 rpm at 65 mph, good enough for me and stock brakes even with the Flathead Ted kit.
     
    stillrunners likes this.
  17. goldmountain
    Joined: Jun 12, 2016
    Posts: 2,934

    goldmountain

    After the last comments on here, I spent a bit of time surfing the web to try and find one and they still seem to be a bit scarce. I remember finding the SROD - the side rod overdrive but not these. In the classified ads here, Dan32Ohio has one listed but chances are, it will be gone by the time the Covid 19 border restrictions are lifted.
     
  18. FalconMan
    Joined: Sep 9, 2008
    Posts: 1,354

    FalconMan
    ALLIANCE MEMBER
    from Minnesota

    This is the one I bought last week, from Dan32Ohio ......

     
  19. goldmountain
    Joined: Jun 12, 2016
    Posts: 2,934

    goldmountain

    My point exactly. I currently have an older cast iron overdrive unit with the Jeep T-176 shifter top adapted to it, but it makes for a really bad shift pattern where if you don't get third gear exactly, it is easy to hit reverse and grind the gears.
     
  20. rusty valley
    Joined: Oct 25, 2014
    Posts: 2,574

    rusty valley
    Member

    No location in your avatar, so i don't know its just down the street, or half way across the world. how much? where ? did it work?
     
    48fordnut likes this.
  21. 1oldtimer
    Joined: Aug 21, 2003
    Posts: 8,025

    1oldtimer
    ALLIANCE MEMBER

    I found one at a Pick your Part (when they used to have a 40% off day) a few years ago, it has the .70 o/d (BS code). Mine has a dual bell bolt pattern and I'm hoping it will fit a '51 Merc bell.
     
  22. deathrowdave
    Joined: May 27, 2014
    Posts: 2,648

    deathrowdave
    ALLIANCE MEMBER
    from NKy

    That trans is gift for you , behind a flat motor . If you tear into it look for counter shaft wear . The OD gear spins on the counter shaft (loads) . Under normal driving it will hold up fine for you . I have one for my 32 that is the SROD model from a Mustang . I prefer yours with the top shift in a hot rod . But I could not locate one .
     
  23. 53 effie
    Joined: Oct 21, 2004
    Posts: 237

    53 effie
    Member

    I have one of those.. hope to use it in my 1927 T roadster build. Any issues getting parts as I am sure mine will need going through?

    I think I saw a magazine article once where they swapped the guts of a regular 1960s toploader 4 speed into one. That might be the way to go as I want to use mine behind a SBF..
     
  24. joel
    Joined: Oct 10, 2009
    Posts: 1,924

    joel
    ALLIANCE MEMBER

    [​IMG]
    Cleaned ,rebuilt, and ready to go into my 41 p/u eventually. I'm using the stock rear end converted to open drive with repo Lincoln brakes and 28 spline axle conversion from Hot Rod Works.
     
    harpo1313 likes this.

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