400 turbo,,pan bolt

Discussion in 'Transmission & Driveline Topics' started by 2nd gen man, Nov 15, 2013.

  1. 2nd gen man

    2nd gen man Veteran Member

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    well,,,as Bad luck comes around..
    while install of my new trans pan, I stripped a pan bolt while
    being careful not to overtorque the bolts.
    wonder if I should drill and tap the next size bigger in metric
    I believe the stock size is 3/8''...dont' really want to drill out to
    1/2'' size...
    anyone else thoughts'
     
  2. LidyGraphics

    LidyGraphics New Member

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    take the bolt to an auto parts store and get a helicoil kit.
     
  3. dale68z

    dale68z Veteran Member

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    Sometimes you can install a longer bolt. Especially if it is a open ended hole. The longer bolt will catch good threads. Just be sure the bolt does not bottom out.

    The bolts are 5/16, not sure if t 400's ever came with metric pan bolts. If they did it would be 8mm
     
  4. 2nd gen man

    2nd gen man Veteran Member

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    thanx, guys
    I am going to check on a helicoil kit tomorrow
    and the bolt size is 5/16 '' I was thinking I could use a
    metric size say,8mm or 9mm that was just a little larger
    dia. its one of the front bolts that is stripped.
    thanx' again
     
  5. mrdragster1970

    mrdragster1970 Veteran Member Lifetime Gold Member

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    .


    If there is enough meat, I would just helicoil it.
    I don't have any 400's to look at the surrounding area.

    I frigging hate working on stuff that guys 1/2 assed with mixed sizes & bolt types.

    .
     
  6. Fbird

    Fbird Veteran Member Lifetime Gold Member

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    it's 5/16 - 18 UNC thread size. NO you do NOT want to install a metric bolt in said hole. It's just unwise as you KNOW the next time you are inn this thing.....trying to reassemble the pan....at 1:00 am about a 12 pack into the job........freezin your azz off......YOU will grab that 1 unidentified metric bolt and plow it into a GOOD hole......then you will have 2 screwed up holes in the case.

    garuanteed by MURPHY

    Spend the $20 accept you screwed up.....heli-coil it and move on.
     
  7. 2nd gen man

    2nd gen man Veteran Member

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    well,,,thanx'
    for all the tips guys,,,
    I was lucky enough to use a longer 5/16''bolt and the
    threads let me torque the bolt down..
    fbird,,no metric,,,,lol
    just more soda....lol
     

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