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Transmission not going into High Gear

Discussion in 'Trucks [ Eighteen Wheelers ]' started by firecatf7333, Oct 30, 2019.

  1. Oct 30, 2019 #1
    firecatf7333

    firecatf7333 Light Load Member

    175
    59
    Oct 28, 2012
    0
    2007 freightliner century 10 speed eaton manual trans

    The past 2 weeks I've noticed a few second lag when flipping the high range switch.. I can hear the air and it sounds sluggish and not normal. Today it wouldn't go into High Gear until 10 minutes after flipping the switch. I have to move the shifter side to side and it will go in high gear but it has the same air lag delay. Its not instant like it used to be.

    I drained the air tanks which were full of water a few days ago.
     
    firecatf7333, Oct 30, 2019
    firecatf7333, Oct 30, 2019
    #1
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  3. Oct 30, 2019 #2
    poppapump1332

    poppapump1332 Road Train Member

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    sounds like something in the back of trans is bad
     
    poppapump1332, Oct 30, 2019
    poppapump1332, Oct 30, 2019
    #2
  4. Oct 30, 2019 #3
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Transmission model number?
     
    BoxCarKidd, Oct 30, 2019
    BoxCarKidd, Oct 30, 2019
    #3
    spsauerland Thanks this.
  5. Oct 30, 2019 #4
    firecatf7333

    firecatf7333 Light Load Member

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    Oct 28, 2012
    0
    I think its an air issue.. The Hi Low shifter won't do anything until I have at least 100 pounds of air. I used to move it with much less than that. Once I hear the "air click" everything shifts fine.


    Where do i get the transmission model #?
     
    firecatf7333, Oct 30, 2019
    firecatf7333, Oct 30, 2019
    #4
  7. Oct 30, 2019 #5
    AModelCat

    AModelCat Road Train Member

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    There should be a filter in the air regulator. Typically its on the back of the transmission, kinda beside the output yoke. When it clogs up, you get a lazy low-high shift.
     
    AModelCat, Oct 30, 2019
    AModelCat, Oct 30, 2019
    #5
  8. Oct 30, 2019 #6
    firecatf7333

    firecatf7333 Light Load Member

    175
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    Oct 28, 2012
    0
    Is there a slave valve ?
     
    firecatf7333, Oct 30, 2019
    firecatf7333, Oct 30, 2019
    #6
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