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Thread: 5th to 4th, Hard Downshift

  1. #11
    Grasshopper
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    I started to notice this issue recently on my 15' DD R/T AWD. Can dealer fix this?

  2. #12
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    Quote Originally Posted by caoliu14 View Post
    I started to notice this issue recently on my 15' DD R/T AWD. Can dealer fix this?
    Short answer, no.
    Robfrmny21 likes this.

  3. #13
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    Well before I knew what it was I made a post. Looks like we are having the same problem.

    https://www.dodgedurango.net/forums/d...-2017-r-t.html

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  5. #14
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    My '15 Durango R/T downshifting was smooth as silk for the 1st 15K miles. Now, at 17K miles, it is at the dealer for the second time for 5-4 & 2-1 hard downshifts. First time, they told me that the controller adapts shift points based on the way we drive. They "cleared memory" & recommended I use Performance mode. Problem was still there. This time, they "cleared memory" again & told me they couldn't duplicate the problem, even driving it hard. I told them to try harder, since it worked for 15K miles. Tomorrow, they will "clear memory to the ground", reload the program, and calibrate as if they installed a new transmission. We'll see whether that cures the problem for another 15K miles. The irritating part is that the dealer cannot do anything else about the issue, so they say that the hard downshifting is normal operation! If that gets out to too many potential buyers, they'll lose business. I'll update this post after I get the D back & run it a few miles.

    2018-07-20 Follow-up:
    Got the Durango back from the dealer, with Powertrain Control Module (PCM) memory "cleared to the ground". The hard downshifts were still there, although not quite as hard. The service advisor mentioned to me that part of their PCM calibration procedure involved coasting to a stop from highway speed. Using that thought, during my driving around town, I lightly braked from city speeds (<45MPH) to 0 MPH religiously for about a week. The hard downshifts are gone. The transmission shifts like new again! My guess is that the key is to lightly brake at a constant deceleration rate to 0 speed (like we're supposed to do at stop signs). Multiple cycles of this constant deceleration seems to reset the downshifts. If anyone knows of a more rigorous procedure we should follow, please let us know.
    BTW: I could detect no difference in downshift performance between ECO mode vs. Performance mode.
    Last edited by Humphrey; 07-20-2018 at 01:29 PM.
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  6. #15
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    Never had this on my '15 SXT Blacktop. Think I had 34K on the clock when I traded it in. However, I'm feeling some rough downshifts on my '18 R/T Blacktop that definitely send me forward.
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  7. #16
    Durango Guru Robfrmny21's Avatar
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    Guys I had my durango trans relearned 4 times then dealer swapped the gear box and even the new trans banged the gears.
    As far as I’m concerned it’s a software issue
    2018 rt !! I post using my cell phone so please forgive misspellings and grammar errors .

  8. #17
    Durango Guru Robfrmny21's Avatar
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    Quote Originally Posted by Humphrey View Post
    My '15 Durango R/T downshifting was smooth as silk for the 1st 15K miles. Now, at 17K miles, it is at the dealer for the second time for 5-4 & 2-1 hard downshifts. First time, they told me that the controller adapts shift points based on the way we drive. They "cleared memory" & recommended I use Performance mode. Problem was still there. This time, they "cleared memory" again & told me they couldn't duplicate the problem, even driving it hard. I told them to try harder, since it worked for 15K miles. Tomorrow, they will "clear memory to the ground", reload the program, and calibrate as if they installed a new transmission. We'll see whether that cures the problem for another 15K miles. The irritating part is that the dealer cannot do anything else about the issue, so they say that the hard downshifting is normal operation! If that gets out to too many potential buyers, they'll lose business. I'll update this post after I get the D back & run it a few miles.
    Get a lawyer and sue dodge
    2018 rt !! I post using my cell phone so please forgive misspellings and grammar errors .

  9. #18
    Grasshopper
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    I've noticed this with my 2016 R/T as well, for both the 5-4 and 2-1 shifts.

    The problem seems to go away with some highway driving and return with heavy street driving.

    I believe this to be a potentially dangerous flaw, especially if the abrupt shift should occur during turns and/or in slippery conditions.

    LH

  10. #19
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    Quote Originally Posted by Humphrey View Post
    My '15 Durango R/T downshifting was smooth as silk for the 1st 15K miles. Now, at 17K miles, it is at the dealer for the second time for 5-4 & 2-1 hard downshifts. First time, they told me that the controller adapts shift points based on the way we drive. They "cleared memory" & recommended I use Performance mode. Problem was still there. This time, they "cleared memory" again & told me they couldn't duplicate the problem, even driving it hard. I told them to try harder, since it worked for 15K miles. Tomorrow, they will "clear memory to the ground", reload the program, and calibrate as if they installed a new transmission. We'll see whether that cures the problem for another 15K miles. The irritating part is that the dealer cannot do anything else about the issue, so they say that the hard downshifting is normal operation! If that gets out to too many potential buyers, they'll lose business. I'll update this post after I get the D back & run it a few miles.

    I am having some slight issues as well. But I have used the Tazer to reset the transmission. Sometimes it feels better. Funny thing with what your dealership said use "performance mode" Well we don't have that in the 15's! Those are only available in the 16+
    Yanks Auto Detailing Owner
    2015 Blacktop R/T
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  11. #20
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    In my '15 R/T, "performance" mode is having ECO turned off.

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