rto f 958ll trans problems and ??????

Discussion in 'Trucks [ Eighteen Wheelers ]' started by earthmover, Mar 19, 2014.

  1. earthmover

    earthmover Medium Load Member

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    Jan 27, 2009
    castalia , north carolina
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    ok guys last week my hi lo went out and it was stuck in high side....I could hear air coming out the slave valve on the side of the trans . took the back off the trans and got inside and needed a input gear and sync. while in the back so I call for the parts gasket and seal and o rings..got all the parts in replace all the parts orings timed the geares and back on the trans...crank truck and still have air coming out the slave valve..took the big lines off the trans used the air tanks to spray air in the ports where the lines go and trans goes from high to low so I say valve is bad..replace it today and same problem air blowing out so bad truck cant even build air pressure...I am at a lost on what it could be ..ive changed all the parts that I could think would cause the problems..before I changed the valve the truck was in the low side and wouldn't come out when the problem started it was in the high side and wouldn't come out..now im in the low side again and want come out...if I could get it in the high side I could get it to my trans man which is 2hrs away....any help would be great...

    the reason I change the parts I did is my freightliner had the same problem a few years back changed the pistons and orings and valve ben fine every since..
     
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  3. Yogibear

    Yogibear Light Load Member

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    Nov 4, 2008
    Bristol, Florida
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  4. earthmover

    earthmover Medium Load Member

    563
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    Jan 27, 2009
    castalia , north carolina
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    I took it out cleaned it up sprayed a little wd 40 on itreplaced the spring in front of it ...but will check it again and I really think that's the problem ...thanks
     
  5. earthmover

    earthmover Medium Load Member

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    Jan 27, 2009
    castalia , north carolina
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    ok guys still at a lots here..replaced all the seals and orings..still blowing air out the slave valve or the shifter handle..could the reg. valve be the case of this problem...also put a new slave valve
     
  6. baha

    baha Road Train Member

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    2,832
    Jul 25, 2013
    ga
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    CK. if you have water in air filter back of trans.
     
  7. earthmover

    earthmover Medium Load Member

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    Jan 27, 2009
    castalia , north carolina
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    No water there I checked it and cleaned it..nothing in it..I took the regulator off and I can blow air through it both ways not sure if thats the way it should work..but full pressure from bith sides..took it apart and its full of trash so I plan to replace it tomorrow. .and see if that helps ..im at my wits in with this thing..had a mechanic come help out he is at a lost..
     
  8. earthmover

    earthmover Medium Load Member

    563
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    Jan 27, 2009
    castalia , north carolina
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    anybody have a link to the air line diagram?????thanks ...I believe I am going to pull the back of the trans off again and take a look..i think the guy left another oring out of the trans..i found 1 new oring in the tool box that came in the package ...all I can think of now ..ive replaced about everything ..slave valve,shifter knob,and suppose to replaced the orings..
     
  9. Yogibear

    Yogibear Light Load Member

    64
    24
    Nov 4, 2008
    Bristol, Florida
    0
  10. earthmover

    earthmover Medium Load Member

    563
    20
    Jan 27, 2009
    castalia , north carolina
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    thank you I found that a little while ago and it is very helpful...now I know I have to take it back out..thanks again
     
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