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tranny grinds when splitting

Discussion in 'Trucks [ Eighteen Wheelers ]' started by seapup, Mar 3, 2011.

  1. Mar 3, 2011 #1
    seapup

    seapup Light Load Member

    88
    15
    Aug 1, 2010
    wodstown,nj
    0
    this is on an eaton fuller 9 speed. trans makes a grinding noise when engaging the splitter up. it does not happen when splitting down or shifting. any ideas?
     
    seapup, Mar 3, 2011
    seapup, Mar 3, 2011
    #1
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  3. Mar 3, 2011 #2
    melpromud

    melpromud Medium Load Member

    463
    114
    Jan 29, 2010
    camden ny
    0
    The synchronizer for the high low range in the back half of the trans is bad. This will eventually happen to all roadrangers. Its common, not hard to fix and not that expensive either. Buy the way your not splitting, your changing range.
     
    melpromud, Mar 3, 2011
    melpromud, Mar 3, 2011
    #2
    rocknroll nik and Koolk Thank this.
  4. Mar 3, 2011 #3
    end of the road

    end of the road Heavy Load Member

    868
    540
    Jul 4, 2010
    Northern Canada
    0
    I had the same issue on a 9 speed EF I drove. Told the company they told me to turn up the radio and I wouldn't hear it. The bugger of that was the truck had no radio.
     
    end of the road, Mar 3, 2011
    end of the road, Mar 3, 2011
    #3
  5. Mar 3, 2011 #4
    seapup

    seapup Light Load Member

    88
    15
    Aug 1, 2010
    wodstown,nj
    0
    The radio answer was a good one. lol
    Can you give me some info on how to replace the synchronizer?
    By the way, my driver just informed me he replaced the shift boot and disconnected the air lines to do it. After putting all back together this noise showed up about an hour later. Coincidence or related?
    Sorry about the splitting wording, I am a newbie and still learning.
     
    seapup, Mar 3, 2011
    seapup, Mar 3, 2011
    #4
  7. Mar 3, 2011 #5
    JMtransmissions

    JMtransmissions Bobtail Member

    15
    4
    Feb 13, 2010
    ontario
    0
    Whats the model number on the trans?

    Make sure you have 60psi from the regulator

    Make sure there are no air leaks

    From the shift knob:
    Red line goes to "S"
    Black line goes to "P" on the slave valve.

    Have a professional chage your syncro and collar. Its not a job for a beginner. Depending how bad and how long its been grinding you may also need the high range gear in the back box.
     
    JMtransmissions, Mar 3, 2011
    JMtransmissions, Mar 3, 2011
    #5
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