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Technical How much hp/tq can torque tube setup handle

Discussion in 'Traditional Hot Rods' started by draggin49, May 21, 2020.

  1. 51504bat
    Joined: May 22, 2010
    Posts: 2,020

    51504bat
    ALLIANCE MEMBER

    Before I knew him a former boss and mentor had a '32 coupe with a Hemi mated to a '39 trans with an adapter. He had issues with the trans scattering on hard 1/2 shifts when racing. But he also had trouble with axle keys breaking. His "I'm a kid and know everything" solution to the key way issue was to polish the hub/axle/key way assembly to insure a tight as possible fit. His father was an old time welder/fabricator who basically told him it was a bad mistake. Of course the first time he jumped on it hard the key way held but the rest of the rear end not so much. He learned the hard way that it was easier to change an axle key than a complete rear end. Of course trans and rear ends were plentiful and relatively cheap in junk yards back then.
     
  2. draggin49
    Joined: Jun 9, 2014
    Posts: 96

    draggin49

    The car was driven quite a few miles before I was able to pick up the car just to look for anything that might pop up .If the bolts weren’t torqued right wouldn’t what happened while I drove the car happen during the many test drive miles the car had logged before I drove it?
    I apologize for not clarifying that this was NOT the car’s first drive , but just the first time I drove the car .
     
    Last edited: May 27, 2020
  3. Russco
    Joined: Nov 27, 2005
    Posts: 4,131

    Russco
    Member
    from Central IL

    That was one of Dick Spadaro’s units. I replaced the twisted tube with a .120 wall 4130 tube and never had another issue. It was behind a 286 flatty with 39 box and a Winters V8 quick change in a A Coupe.
     
    draggin49 likes this.
  4. Budget36
    Joined: Nov 29, 2014
    Posts: 3,608

    Budget36
    Member

    Didn't HRM or another mag in the late 50's/early 60's do an article about converting other type of axle for the banjo rear, and eliminate the tapered axles?
     
  5. 31hotrodguy
    Joined: Oct 29, 2013
    Posts: 1,688

    31hotrodguy
    Member

  6. HotRodWorks
    Joined: Dec 6, 2005
    Posts: 258

    HotRodWorks
    Alliance Vendor

    It may have taken a few miles for the bolts to back off that far. However, they wouldn't back off like that if they were properly torqued to begin with.
     
    31hotrodguy and C69A like this.
  7. draggin49
    Joined: Jun 9, 2014
    Posts: 96

    draggin49

    Thank you for clarifying, that makes sense.
     
  8. rusty valley
    Joined: Oct 25, 2014
    Posts: 1,662

    rusty valley
    Member

    those bolts were supposed to be safety wired also, note the holes in the head. i would think at the very least you should step up to the later 32 design rear end while its apart.
     

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