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Trans fluid change

Discussion in 'Truck & Equipment Repair' started by snowish10, Mar 1, 2015.

  1. snowish10

    snowish10 PlowSite.com Addict
    Messages: 1,082

    I just had my trans rebuilt in my f350 this summer and I've snow plowed 100 hours this season. How often does everyone change their trans fluid in their plow trucks??
     
  2. OneBadDodge06

    OneBadDodge06 Senior Member
    from Iowa
    Messages: 735

    Once a year.
     
  3. snowish10

    snowish10 PlowSite.com Addict
    Messages: 1,082

    Thats what I figured, Id rather spend the money to get it changed and just be safe.
     
  4. OneBadDodge06

    OneBadDodge06 Senior Member
    from Iowa
    Messages: 735

    They've come a long way with improving atf, so unless it gets roasted...I don't worry about it.

    But to each their own. Oil is cheap compared to a rebuild.
     
  5. kimber750

    kimber750 PlowSite Veteran
    Messages: 3,705

    Twice a year. Do it in the fall before plowing and in the spring before towing starts. Spring is just a flush and fall is flush and filter.
     
  6. john r

    john r Senior Member
    from NJ
    Messages: 239

    What do you mean by "change"? A complete flush or just pan oil and filter?
     
  7. john r

    john r Senior Member
    from NJ
    Messages: 239

    BTW have you thought about installing a deep pan and a 26,000 lb cooler?
     
  8. snowish10

    snowish10 PlowSite.com Addict
    Messages: 1,082

    I actually installed a 26roe cooler
     
  9. On a Call

    On a Call Senior Member
    Messages: 760

    About once a week.

    With as much as mine leaks
     
  10. john r

    john r Senior Member
    from NJ
    Messages: 239

    Keeping the trans oil cool is more important than changing it.
     
  11. On a Call

    On a Call Senior Member
    Messages: 760

    John where were you two weeks ago with that message
     
  12. snowish10

    snowish10 PlowSite.com Addict
    Messages: 1,082

    Mine never gets over 150 even in the middle of summer
     
  13. Sprag-O

    Sprag-O Senior Member
    Messages: 220

    I'd be cautious about changing ATF too frequently on an older trans. As they wear the metal and other particles end up acting as a type of friction modifier.

    You've probably heard a story about someone that changed their 150k old ATF, and then the transmission eats it.

    I prefer to set a mileage interval, typically 50k. If you want to change it every 6/12 months, I'd look into Lucas or another additive that comes with some modifier added.
     
  14. john r

    john r Senior Member
    from NJ
    Messages: 239

    I have synthetic in my 450 with a aftermarket deep pan and cooler. My needle most the time doesnt even move off 140 degrees. Really the only time the oil gets hot is in 4WD low.
     
    Last edited: Mar 2, 2015
  15. kimber750

    kimber750 PlowSite Veteran
    Messages: 3,705

    Twice a year has gotten me to 200k so far on a 4r100 behind a 7.3.
     
  16. john r

    john r Senior Member
    from NJ
    Messages: 239

    I just remembered on one of our trucks we installed a drain plug in the trans pan. The idea was when the engine oil was changed to do the trans at the same time. That would be good on a stock pan.
     
  17. scott3430

    scott3430 PlowSite.com Addict
    Messages: 1,005

    Once a year in the fall before plowing season.
     
  18. carplowguy

    carplowguy Junior Member
    from none
    Messages: 29

    Sorry but I have never bought into this theory... When ATF breaks down it doesn't offer the needed protection & all the dirt in it just gums up the seals cause the drums to not pressure proper, then it will slip...

    The reason the myth was created is the quick lube places that change tranny fluid without removing the pan. They power flush the new ATF in thru the cooler lines & it stirs up all the crap they didn't clean out of the pan & circulates it thru the tranny.

    If you want to flush your tranny the pan MUST be cleaned first & the filter NEEDS to be replaced.

    Changing oil is never a bad thing unless it is done wrong.
     
  19. Plowtoy

    Plowtoy Senior Member
    Messages: 929

    I always have the flush done first, then right to my shop where I can drop the pan and change the filter. I do it this way so the old filter can catch any debris, instead of plugging up a new filter.

    Also, I only flush them one time, right after I made the vehicle purchase (I never buy new vehicles). Then a filter and new fluid once a year, whether it needs it or not.
     
  20. carplowguy

    carplowguy Junior Member
    from none
    Messages: 29

    The problem is 97% of the debris is in the pan, not the rest of the tranny so I wouldn't be concerned with the small amount you get in the new filter during the flush.

    It is pretty easy to flush it yourself by running the cooler line into a bucket till it pumps the torque out. You just need a buddy to start & stop the vehicle well you add fluid & watch the bucket.