Problem with ishift transmission .help plz

Discussion in 'Volvo Forum' started by warrior12345, May 4, 2022.

  1. warrior12345

    warrior12345 Light Load Member

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    Hi guys
    The fault code i had was p107538.
    Truck is 2015 volvo vnl with ishift.737000 miles.
    .i changed CCA ,CCV, CLUTCH ,flywheel,harness.also shop mentioned that they changed bearing, air fitting, tube,bolt .reset clutch and guess what truck is still hesitating coming out of stop .even in 4th or 6th gear now ..only thing that has not been changed is air hose but mechanic said it is good.am frustrated .am suspecting it is only doing it after driving fr 3-4 hours.
    No transmisdion fault codes.only codes i have are fr nox sensors.
     
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  3. 86scotty

    86scotty Road Train Member

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    Ask this in the Volvo trucks section and you'll get responses from mechanics.
     
  4. KB3MMX

    KB3MMX Road Train Member

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    What do you mean it's hesitating ?

    Slow shift?

    Or is it an engine power issue?
     
  5. warrior12345

    warrior12345 Light Load Member

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    Jul 16, 2017
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    Slow shift and waits in between gears.
     
  6. Another Canadian driver

    Another Canadian driver Heavy Load Member

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    There may be transmissions fault codes that are not showing on the dash.
    A tech tool may catch it during an instrumented test
    (normal driving operation with the tech tool connected to the BUS port).
    Couple hundred dollars in cost, probably for the test.
     
  7. KB3MMX

    KB3MMX Road Train Member

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    Which software shift program calibration are you using?

    You may have one of the lazy shifting calibrations like "comfort" (fuel tanker anti surge calibration) .. swap it to performance or comprehensive and it should improve shift speed.
     
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