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Eaton autoshift with clutch erratic in cold weather in the beginning

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by ichudov, Dec 29, 2017.

  1. Dec 29, 2017 #1
    ichudov

    ichudov Heavy Load Member

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    Mar 14, 2012
    Berkeley, IL
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    My driver drives a Freightliner Columbia with Eaton Autoshift. This is a three pedal truck with a clutch pedal.

    We have a cold spell here about 0 degrees.

    He reports erratic shifting in the first two miles of the journey, then he says all becomes good. Any idea what may cause it? He says that it seems to be changing RPM wildily etc.
     
    Last edited: Dec 29, 2017
    ichudov, Dec 29, 2017
    ichudov, Dec 29, 2017
    #1
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  3. Dec 29, 2017 #2
    Frontman

    Frontman Light Load Member

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    Apr 4, 2012
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    I could not tell ya for sure, but my century auto freaks out at 10 degrees. Probably wouldn't even shift at 0.
     
    Frontman, Dec 29, 2017
    Frontman, Dec 29, 2017
    #2
  4. Dec 29, 2017 #3
    ichudov

    ichudov Heavy Load Member

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    Mar 14, 2012
    Berkeley, IL
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    Frontman, but did you ever find out why it does it? Does it go away after some initial time on the trip?
     
    ichudov, Dec 29, 2017
    ichudov, Dec 29, 2017
    #3
  5. Dec 29, 2017 #4
    Justrucking2

    Justrucking2 Road Train Member

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    Plymouth MI
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    Warm the truck up, and what you described is more than likely normal in these temps. My 18 spd manual is rough shifting until I get everything up to temp. Nothing to worry about.
     
    Justrucking2, Dec 29, 2017
    Justrucking2, Dec 29, 2017
    #4
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  7. Dec 29, 2017 #5
    Frontman

    Frontman Light Load Member

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    Agree with Justucking2 ... always gets better as truck temp rises.

    Like your driver reports, just don't shift normal at those temps when leaving out.
     
    Frontman, Dec 29, 2017
    Frontman, Dec 29, 2017
    #5
    ichudov and Justrucking2 Thank this.
  8. Dec 29, 2017 #6
    Heavyd

    Heavyd Road Train Member

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    +3, we never trouble anything like that unless it happens at warmer temps. Cold just changes everything.
     
    Heavyd, Dec 29, 2017
    Heavyd, Dec 29, 2017
    #6
    ichudov Thanks this.
  9. Dec 29, 2017 #7
    Ribeye

    Ribeye Light Load Member

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    Jan 4, 2012
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    Same here lately, in 5-15 degree weather, my '15 cascadia with dt12 was acting sluggish, around 6th gear shift. Did it a few times couple days in a row at start of day, not real warmed up yet, so must be the cold.
     
    Ribeye, Dec 29, 2017
    Ribeye, Dec 29, 2017
    #7
    ichudov Thanks this.
  10. Dec 31, 2017 #8
    spsauerland

    spsauerland Road Train Member

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    West Harrison, In
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    Electric motor struggles just as much as your right arm when fighting cold transmission fluid!
     
    spsauerland, Dec 31, 2017
    spsauerland, Dec 31, 2017
    #8
    ichudov Thanks this.
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