Normal transmission temperatures with Trailer Tow Group IV cooling package
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Thread: Normal transmission temperatures with Trailer Tow Group IV cooling package

  1. #1
    Grasshopper
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    Normal transmission temperatures with Trailer Tow Group IV cooling package

    I have a brand new 2019 Dodge Durango SXT which I purchased for towing a 17 foot Casita trailer. I haven't towed yet because I don't yet have 1000 miles on it. I just got back from a 150 mile freeway trip, 95 degree weather, and the whole time the transmission temperature was between 195 up to 200 a couples of times. I was driving in the normal Eco mode. Changing out of it didn't seem to change anything.

    Is this normal? It seems very high as I read things on the internet. I've sent an email to my Dodge owner/general manager contact. This is making me so nervous. I'm a recent widow, and scared of getting ripped off.

    Thanks for any input. I'm curious if there are Dodge specs for what the temps should be, both towing and not towing, with their factory cooling package.

    Deborah

  2. #2
    Senior Member B5SRT's Avatar
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    That’s a normal temp


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  3. #3
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    That is really good news. Can you help me reconcile that with all the info I see that says that transmission fluid degrades and parts start to have problems at temps not much hotter?

    I guess my biggest question won't be answered til a few weeks from now when I take my first trip, with 2 good sized grades. Will the Durango get much hotter when towing?

    If this is normal and healthy, that would make me very happy

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  5. #4
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    Quote Originally Posted by B5SRT View Post
    That’s a normal temp


    Sent from my iPhone using Tapatalk
    Just to clarify, that's normal for with a transmission cooler?

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  6. #5
    Grasshopper TheBum's Avatar
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    You'll notice that, along with the numeric temp, there's a semicircular gauge. The transmittion in my '19 GT Plus sometimes hits as high as 220, but if you look at the gauge, it's barely above the center point. I would assume that any temp toward the middle is normal.

  7. #6
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    I did see that, but I also see all these charts that say transmissions don't last if temps get too high.

    I've got my sales guy talking to the transmission specialist mechanics shortly to see what they say. If they say it's OK, I'm going to ask for a reference to the documentation. And this is all via email, so in writing, for my files. If I get all that then I will feel better.

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  8. #7
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    OK here's a copy of what I sent sales guy, with info I learned, including a FCA transmission repair manual

    ×*********



    Hi Michael --*


    I've made a good beginning.* *I'm going to just cut and paste what I put into my Evernote file for reference.* I'm feeling somewhat reassured, especially by the FCA document.*


    https://www.dodgedurango.net/forums/...on-temp-4.html


    https://www.ramforumz.com/showthread.php?t=165978


    Transmission is ZF 8HP and may be ok to run hotter.


    *********************************


    http://perception.fcaperformanceinst...84/0221308.pdf


    pg 16 references 194 degrees for normal temp


    "The bypass valve directs fluid back to the transmission lubrication circuit until the fluid temperature reaches 194 degrees F.* When the fluid temperature reaches this threshold, the bypass valve opens and allows fluid to flow through the cooler, then return to the transmission.* "


    pg 95 references high temperature strategy at 248 degrees


    *********************************

    So the forums show some guys experiencing the same thing, which is neither here nor there, but the FCA document makes it sound as though 194 degrees is fine, and that 248 degrees is the "red line".


    Could you please share this with Jacob the service writer, and ask him to please ask the transmission tech guys to find me a spec sheet or something similar to the FCA document above that says these temps are within spec?* I'm inferring it from what I read, but if I could just see it in print, then I could put this to rest.


    It may sound silly but remember that the internet is full of these charts below that say 175 degrees is optimal, and it sounds like this transmission is never going to do this.


    http://transmissionrepairguy.com/tra...rature-gauge/*


    Thanks for all your help so far,


    Deborah

    *


    *




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  9. #8
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    If your're that concerned, most transmission coolers only run a couple hundred dollars at most and are a pretty easy install!

  10. #9
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    I double checked last evening. Air temp was 72 F, driving at 68 mph on a flat highway with cruise control on, a/c was off of course. My '14 V6 has the factory tow package and HD cooling. Trany fluid temp was at 190 F.

  11. #10
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    Thank you! That's reassuring

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