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Frothy Transmission oil

Discussion in 'Experienced Truckers' Advice' started by RepoweredRookie, May 7, 2023.

Page 2 of 2
  1. May 7, 2023 #11
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Why?
     
    Big Road Skateboard, May 7, 2023
    Big Road Skateboard, May 7, 2023
    #11
    singlescrewshaker Thanks this.
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  3. May 7, 2023 #12
    AModelCat

    AModelCat Road Train Member

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    Ok so that cooler wouldn't cause your issue. Coolant doesn't flow through it.

    What oil did you put in it?

    I wonder if you've just found your mystery air leak? Aeration of the oil will cause it to look frothy.
     
    AModelCat, May 7, 2023
    AModelCat, May 7, 2023
    #12
    Magoo1968, Rideandrepair, singlescrewshaker and 4 others Thank this.
  4. May 7, 2023 #13
    RepoweredRookie

    RepoweredRookie Light Load Member

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    I put the 50W Trans fluid from the Freightliner dealer. Where do you think air could get into the trans?
     
    RepoweredRookie, May 7, 2023
    RepoweredRookie, May 7, 2023
    #13
  5. May 7, 2023 #14
    AModelCat

    AModelCat Road Train Member

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    Transmission aux section is shifted with air. At least the Eatons are. I'm not familiar with Meritors so I pulled up pictures of a Meritor 10 speed and its got air lines running to the aux section as well.
     
    AModelCat, May 7, 2023
    AModelCat, May 7, 2023
    #14
    Rideandrepair, singlescrewshaker, RepoweredRookie and 1 other person Thank this.
  7. May 7, 2023 #15
    RepoweredRookie

    RepoweredRookie Light Load Member

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    The splitter slave valve is having issues where I have to cycle the splitter before rolling, or it won’t let me go into Hi gears for 30 seconds.
     
    RepoweredRookie, May 7, 2023
    RepoweredRookie, May 7, 2023
    #15
    singlescrewshaker and Big Road Skateboard Thank this.
  8. May 7, 2023 #16
    RepoweredRookie

    RepoweredRookie Light Load Member

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    Originally was thinking the thick grime on the cooler may have overheated the oil, but the gauge has always been below 150 degrees. Going to research air to trans issues. Thanks for the idea!
     
    RepoweredRookie, May 7, 2023
    RepoweredRookie, May 7, 2023
    #16
    Big Road Skateboard and singlescrewshaker Thank this.
  9. May 7, 2023 #17
    Ridgeline

    Ridgeline Road Train Member

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    Because oil that runs too cool presents a number of problems, one is sludge. It is just like running a car just for a mile or two, the oil doesn't heat up enough to boil off some of the contaminants and produces sludge. I had seen this in transmissions and even a couple of axles in my years.

    It looks like this is a Stewart Warner gauge that may have the wrong sensor.
     
    Ridgeline, May 7, 2023
    Ridgeline, May 7, 2023
    #17
  10. May 15, 2023 #18
    Kshaw0960

    Kshaw0960 Road Train Member

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    Fyi oil can also get frothy if it’s over filled
     
    Kshaw0960, May 15, 2023
    Kshaw0960, May 15, 2023
    #18
    RepoweredRookie Thanks this.
  11. May 15, 2023 #19
    RepoweredRookie

    RepoweredRookie Light Load Member

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    Yeah I rechecked the trans oil again, and this time it was normal. I think I did over service it, and it made a small head on a beer sized froth that came out last time. Appreciate the response.
     
    RepoweredRookie, May 15, 2023
    RepoweredRookie, May 15, 2023
    #19
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