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Technical Need some tranny and rearend advice

Discussion in 'Traditional Hot Rods' started by TrueBlue23, Jun 25, 2020.

  1. AHotRod
    Joined: Jul 27, 2001
    Posts: 10,516

    AHotRod
    Member

    I have built several T bucket roadsters, from 4cyl Datsun power-to-400+ c.i.d. They 'can' be a total blast to drive, steer and handle great, ride very good ... as long you you 'design' the car to do so.
    #1. Build the car with a low center-of-gravity as well as overall height.
    #2. Make sure the wheelbase is at least 105"
    #3. I made a "Quarter-Eliptic-3 Link" rear suspension that rode fantastic. ( One car we did with torsion bars at it rode awesome)
    #4. Be certain to allow for plenty of radiator area to properly cool your engine.

    Your 472 Cadillac and the matching T-400 trans will make it a rocket ship in stock form (I'm not kidding)
    As to rear end choice, I've used Ford 8", Ford 9", MoPar 8-3/4". I've found that a 2.70-ish rear gear ratio is perfect for most V8 engines..... you can run all day down the highway and not beat your self up or your engine.

    Here is a couple of pictures of a T-roadster from back in the 70's, study the overall look, suspension, axle,etc... this car is awesome, and I still think I would love to build one similar to it yet today (without the costly Hemi).
    I also made convertible tops and side curtains (removable with velcro) for my cars because I drove mine in any kind of weather, even snow.

    If you do it right, your going to have a ball with it. And if you don't, well ..... then don't waste your time and money.


    t%20bucket%20peoria%2070%20-%202.jpg

    t%20bucket%20peoria%2070.jpg
     
  2. Holy shat, I'm dying here.
     
    High test 63 likes this.
  3. badshifter
    Joined: Apr 28, 2006
    Posts: 3,168

    badshifter
    Member

    Me either. Maybe he's mixing up the BOP trans as dual bolt pattern?
    Anyhow, speedway and tons of other places sell an adapter for $40 bucks so a Chevy short tail shaft 400 is a bolt in deal. I'm sure torque converters still bolt up, but maybe with spacers?

    To the OP, define, or clarify "expert advice" as it relates to the internet.....and the thread title......
     
    TrueBlue23 and squirrel like this.
  4. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,218

    56sedandelivery
    ALLIANCE MEMBER

    First of all, intros are no longer a requirement; Ryan dropped that policy some time ago. Personally, I just prefer the profile is filled out completely; "name, rank, and serial number", as it were. As far as the TH400 goes, the short shaft extension housing and output shaft can be swapped in place of the long shaft unit. That's all I've got.
    I am Butch/56sedandelivery;.
     
  5. Mike Colemire
    Joined: May 18, 2013
    Posts: 1,210

    Mike Colemire
    Member

    Squirrel I've seen several, I worked at a large salvage yard for 18 yrs, up until the early 90's. We srapped I don't know how many 400 turbos, wasn't no market for them, they very seldom went bad. Wish I had saved several of them along with a bunch of other stuff I seen go.
     
  6. squirrel
    Joined: Sep 23, 2004
    Posts: 46,108

    squirrel
    Member

    Interesting. wonder what years they were made? I've seen dual bolt pattern 200-4R and TH350, but never a 400.
     
    Hnstray and 31Apickup like this.
  7. bundoc bob
    Joined: Dec 31, 2015
    Posts: 114

    bundoc bob

    My 2 cents is that you need a 3 or 4 speed trans in that rig like
    a hole in the head. Go find a ST300, which is a sort of an HD powerglide
    [also came with a VP converter in earlier years, and uses 300-400
    converters] Shorter, lighter and all you'll need. BOP used them for years.
    A note in passing: saw exactly one dual BP ST300. No idea why GM made
    it, came out of an Olds, sat in the rack for years and finally went behind a 396. Transgo never made a shift kit for them, but they had a 2 page handout that made them shift pretty good.
     
    Hnstray and TrueBlue23 like this.
  8. Jmountainjr
    Joined: Dec 29, 2006
    Posts: 1,105

    Jmountainjr
    ALLIANCE MEMBER

    The Ford Explorer 8.8 a good axle and has a 3.25" tube and 31 spline axles. For a T bucket I would use the 1990-1994 ones with 10" drum brake. You don't need, or want, too much rear brake.
     
    TrueBlue23 likes this.
  9. TrueBlue23
    Joined: Jun 13, 2020
    Posts: 15

    TrueBlue23

    picked up the beast today. Wasn't sure the year this came out of but after checking the numbers, it looks like it was a 68-69?? Block number 1486238 IMG_4962.jpeg
     
    AHotRod likes this.
  10. ROADSTER1927
    Joined: Feb 14, 2009
    Posts: 2,740

    ROADSTER1927
    Member

    I had a 70 chevy short box step side with a 500 caddy and rear axle. You could twist it and roast the tires at will!
     
    AHotRod likes this.

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