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Allison 3340 trans

Discussion in 'Shop Talk' started by mog5858, Nov 30, 2019.

  1. mog5858

    mog5858 Well-Known Member

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    Feb 1, 2015
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    Location:
    estavan SK
    I working on my 3340 CT out of my S7 scraper. when I tight down the end bearing support as the book said I get .050 gap but the trans is bond up I can turn it but with the help of a strap wrench but very tight and over twice what the book said. where should I look for my stack up error?? I know this is a vague question but this projet is getting old and help I take it.
     

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  2. RZucker

    RZucker Senior Member

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    Occupation:
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    I don't have any experience with 3300's, but I would study the cross section view in the manual and see what may be out of position. Can you tell by the feel if it's plates dragging or pressure on a bearing? I put a clutch piston in a 6061 backwards once and it made the plates drag, lucky I found it before it went back in the machine by doing the turn test.
     
  3. mog5858

    mog5858 Well-Known Member

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    Location:
    estavan SK
    thanks, I ended up just taking all apart Sunday and staring back a square one didn't find anything that I had put in the wrong spot. things went back together way faster the second time. I just got to reassemble the torque converter and then I guess we see if I know what I was doing.
     
  4. 56wrench

    56wrench Senior Member

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    I assume you pre-soaked all the friction discs with atf? one of the common causes of excessive drag or binding besides components installed backwards is a thrust washer somewhere that is not seated properly
     
  5. mog5858

    mog5858 Well-Known Member

    Joined:
    Feb 1, 2015
    Messages:
    97
    Location:
    estavan SK
    thanks for the help all the frictions where used so they were still wet. everything is back together now just have to reinstall in the machine now.