transmission problem

Discussion in 'Peterbilt Forum' started by coulds, Nov 4, 2012.

  1. coulds

    coulds Bobtail Member

    24
    0
    Nov 4, 2012
    Richmond,Va
    0
    I had a 94 379 pete with a 10sp eaton transmission when it's cold I had problems with my trans shifting to the high side it also makes a grinding noise when i move the splitter from high to low do anyone no what the problem could be.
     
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  3. Worthken

    Worthken Light Load Member

    265
    83
    Jun 2, 2012
    Delmas South Africa
    0
    It's the lo-high syncro's in the back section going out. Usually when the oil is still cold it splits fine, as soon as the oil starts heating up it grinds when changing range.
     
    coulds Thanks this.
  4. freightlinerman

    freightlinerman Road Train Member

    1,287
    536
    Mar 4, 2011
    Florida
    0
    Double clutch and you wont have this problem. I have the same issue in my 9 speed in a 91 L9000 with series 60.
     
    coulds Thanks this.
  5. coulds

    coulds Bobtail Member

    24
    0
    Nov 4, 2012
    Richmond,Va
    0
    Thanks for your reply is it a hard fix??
     
  6. coulds

    coulds Bobtail Member

    24
    0
    Nov 4, 2012
    Richmond,Va
    0
    thanks I'll try that tomorrow
     
  7. 1johnb

    1johnb Medium Load Member

    542
    405
    Jun 13, 2012
    New Paris Ohio
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    I would check the splitter cylinder if it shifts ok warmed up. Splitter cyl o rings could be hard and not sealing when cold. If it is the synchronizer you will have to remove the aux box. If it is a FRO the top plate has to come off also.
     
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