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Dt12 transmission air problems

Discussion in 'Freightliner Forum' started by Mflegacy, Jan 19, 2023.

  1. Jan 19, 2023 #1
    Mflegacy

    Mflegacy Bobtail Member

    1
    0
    Jan 19, 2023
    0
    Hello. I have a 16 cascadia with dt12. Recently my truck started to rev when I would shift from even # gears to odd # gears. Ex 8-9 10-11. But doesn't rev when shifting from odd gears to even gears. Or even odd gears to odd gears. Any idea what this could be?
     
    Mflegacy, Jan 19, 2023
    Mflegacy, Jan 19, 2023
    #1 + Quote Reply
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  3. Feb 9, 2023 #2
    Timm1q

    Timm1q Bobtail Member

    6
    0
    Mar 14, 2022
    0
    Hi. The same. Did you resolve it?
    As for me - did already program update - no changes. Mechanic connected to truck and checked for faults - all is good.
    Why did you think that the problem is connected with air?
     
    Timm1q, Feb 9, 2023
    Timm1q, Feb 9, 2023
    #2 + Quote Reply
  4. Feb 13, 2023 #3
    NorCenArk

    NorCenArk Light Load Member

    69
    32
    Mar 31, 2011
    Russellville, AR
    0
    My 16 Western Star with DT12 is doing the same. A friend of mine has software for troubleshooting, we did a transmission and clutch relearn but it did not change anything. Next thing I will do is check wiring harness to TCM and pins to make sure there is no corrosion.
     
    NorCenArk, Feb 13, 2023
    NorCenArk, Feb 13, 2023
    #3 + Quote Reply
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