SBC conversion rear crossmember

Discussion in '40- & 55-Series Tech' started by brian64, Feb 27, 2004.

  1. brian64

    brian64

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    I have a SBC conversion (w/ rear crossmember bolted to rear of t/c) installed by the PO in my 40. Has anyone has a problem with these (fatigue or structural failures, etc.)? Just trying to determine the strength and longevity of the part.
    Thanks,
    Brian
     
  2. Rice

    Rice

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    Have not had a failure or signs of fatigue. Output is about 400 ft-lb at the flywheel (so higher at the transfer case) and also didn't experience any failures when running a big block. Keep in mind the motor mounts are also a big portion of the equation.
     
  3. woody

    woody unhelpful spotter Staff Member Admin

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    I have....bolts never stayed tight, leaked at the cover all the time. Switched to studs on the t-case and modified the crossmember slightly (initially, a drainback hole, now it no longer needs the rear cone) and it works great.
     
  4. dinkleberry

    dinkleberry

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    Bolts keep loosening on mine. Loctite fixed it.

    That's the only problem I've had.
     
  5. Poser

    Poser Oh...Durka Durka Durka. s-Moderator Supporting Vendor

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    AA provides studs with all new versions of this that they sell.

    Studs and red locktite are the ticket with keeping this tight and leak free..

    IIRC the new ones from AA are also 'modified' already so that gear oil will not collect up in that cover area....

    Good luck!

    -Steve
     
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