The hard downshifts in sport mode

[MerlintheMad]

Could bedding the breaks a few months ago when they replaced the rotors have tweaked the TCU somehow then? The dude seemed confident the system self adjusted after initial use.

I couldn't say. But I do know that the car does not memorize a driving style. It anticipates in Smart mode only. I think that a lot of misconception exists in the minds of many of us: as in my mind vis-à-vis believing for months that the Stinger's central computer stores information, "memorizing" how I drive. This "dude" thinks that such a capacity exists for the entire range of drive modes: at least I only ascribed it (still mistakenly) to Smart mode.

 

[OnTheRoad]

I couldn't say. But I do know that the car does not memorize a driving style. It anticipates in Smart mode only. I think that a lot of misconception exists in the minds of many of us: as in my mind vis-à-vis believing for months that the Stinger's central computer stores information, "memorizing" how I drive. This "dude" thinks that such a capacity exists for the entire range of drive modes: at least I only ascribed it (still mistakenly) to Smart mode.

Sounds like something worthy of further investigation. To be more specific, the service person said they reset the transmission. I made the assumption he was referring to the TCU, but now realize I may have jumped the gun on that assumption. On the invoice, the tech just wrote that he "reset the adaptives." My gut tells me the car does self adjust based on driving style in one form or another, but I'm no car guy.

Maybe he reset something like this that I found for a BMW?

 

[MerlintheMad]

… but I'm no car guy.

That makes two of us. There is a TSB for a "reflash" of the transmission "logic"; whatever that actually means. And my service guy has reminded me each time I've gone in for routine maintenance, giving me the opportunity to have it done. But each time I am happy to say that there is nothing wrong with my tranny, which shifts firmly but smoothly and with alacrity. So, "If it ain't broke, don't mess with it". Maybe your techs did the reflash as instructed in the TSB?

 

[OnTheRoad]

That makes two of us. There is a TSB for a "reflash" of the transmission "logic"; whatever that actually means. And my service guy has reminded me each time I've gone in for routine maintenance, giving me the opportunity to have it done. But each time I am happy to say that there is nothing wrong with my tranny, which shifts firmly but smoothly and with alacrity. So, "If it ain't broke, don't mess with it". Maybe your techs did the reflash as instructed in the TSB?

I don’t think so since he said I did not need that TSB. I’ll do more digging. Mostly curious what adaptives are and how they work.

 

[OnTheRoad]

I couldn't say. But I do know that the car does not memorize a driving style. It anticipates in Smart mode only. I think that a lot of misconception exists in the minds of many of us: as in my mind vis-à-vis believing for months that the Stinger's central computer stores information, "memorizing" how I drive. This "dude" thinks that such a capacity exists for the entire range of drive modes: at least I only ascribed it (still mistakenly) to Smart mode.

I'm not so sure that the TCU does NOT memorize a driving style. It sounds like shift points can be based on calibration curves in memory. So unless I'm mistaken, there's an algorithm that uses inputs from various sensors to determine the shift points. On a basic level the car remembers whether the driver drives aggressively or relaxed and makes adjustments accordingly. This article talks about "ongoing memory:"

How does an adaptive transmission work l4-2.5l escape aut...

If that's the case I could absolutely see how I may have tweaked things trying to bed the new brakes. It will be interesting to see if it eventually reverts back to aggressive downshifting when coming to a full stop.

 

[Vladec]

Only does it sport mode....not sure what it is but I'm pretty sure it's by design

 

[5tinger]

The downshift braking on my Stinger is actually smooth.
Not as smooth as a circa 2005 auto with no downshift braking where it will coast for miles.

When lifting foot off throttle, the shifting is very subtle, almost unnoticeable.
Mine is a DEC 2018 build

 

[OnTheRoad]

The downshift braking on my Stinger is actually smooth.
Not as smooth as a circa 2005 auto with no downshift braking where it will coast for miles.

When lifting foot off throttle, the shifting is very subtle, almost unnoticeable.
Mine is a DEC 2018 build

 

[OnTheRoad]

Sounds about as it should be. Mine feels like night and day since the adaptives were reset.

 

[Vladec]

Only does it sport mode....not sure what it is but I'm pretty sure it's by design[/QUOTE
I guess I should of mentioned other cars I owned with a sport mode did the same thing

 

[MerlintheMad]

I'm not so sure that the TCU does NOT memorize a driving style. It sounds like shift points can be based on calibration curves in memory. So unless I'm mistaken, there's an algorithm that uses inputs from various sensors to determine the shift points. On a basic level the car remembers whether the driver drives aggressively or relaxed and makes adjustments accordingly. This article talks about "ongoing memory:"

How does an adaptive transmission work l4-2.5l escape aut...

If that's the case I could absolutely see how I may have tweaked things trying to bed the new brakes. It will be interesting to see if it eventually reverts back to aggressive downshifting when coming to a full stop.

Now you've got me wondering afresh. That sure sounds like "learning" to me.

 

[G-387311]

Not sure of the build month, but bought my 2019 GT2 this past September. I’ve had the same issue with downshifts, in all drive modes.
The interesting part is that I never noticed this until about 30 days ago. It was always smooth before.
Interested to hear about the transmission “memory”.
I wish this was only in sports mode. I love being able to cruise in comfort mode with the wife and kids, but like the aggressive feel in sport, but unfortunately I feel the strong downshifts in comfort too.

 

[OnTheRoad]

Not sure of the build month, but bought my 2019 GT2 this past September. I’ve had the same issue with downshifts, in all drive modes.
The interesting part is that I never noticed this until about 30 days ago. It was always smooth before.
Interested to hear about the transmission “memory”.
I wish this was only in sports mode. I love being able to cruise in comfort mode with the wife and kids, but like the aggressive feel in sport, but unfortunately I feel the strong downshifts in comfort too.

Yea was all modes for me too. Try unhooking the battery and see if that resets the TCU and fixes it like it did on mine. Not sure if that's how the dealer did it for me but that should work.

 

[G70 Owner]

Yea was all modes for me too. Try unhooking the battery and see if that resets the TCU and fixes it like it did on mine. Not sure if that's how the dealer did it for me but that should work.

So your dealer only said that they ‘reset the adaptives’? I’m having hard downshifts too and I’m wondering how to fix. Not super excited about pulling my battery and loosing any settings though...

 

[NS_Stinger]

Strangely I've never tried smart mode in my Stinger yet. For the guys that use it does the screen light up showing the mode changes on the centre display when in smart mode?

 

[OnTheRoad]

So your dealer only said that they ‘reset the adaptives’? I’m having hard downshifts too and I’m wondering how to fix. Not super excited about pulling my battery and loosing any settings though...

Yes that's right. I don't recall anything else getting reset. Seems like a pretty minor price to pay if it works though. I'm actually surprised that the problem has not come back. If it really was just a problem with the adapatives getting set too aggressively, I would be curious to know what may have triggered that. Let us know if you have any luck!

 

[G70 Owner]

Yes that's right. I don't recall anything else getting reset. Seems like a pretty minor price to pay if it works though. I'm actually surprised that the problem has not come back. If it really was just a problem with the adapatives getting set too aggressively, I would be curious to know what may have triggered that. Let us know if you have any luck!

Did you come back to all your settings gone or anything to indicate the battery had been disconnected?

 

[OnTheRoad]

Did you come back to all your settings gone or anything to indicate the battery had been disconnected?

I did not. So there's the issue of whether it will work at all as well as anything else getting reset. I guess we won't find out unless a few folks volunteer or ask their dealers if the TCU adaptives can be reset without unplugging the battery.

 

[livingSmoke]

I bought a used 2018 GT last week and I've put about 400 miles on it. This car is fantastic with my only complaint being this issue.

Im noticing a jerk in the form of abrupt engine breaking when the car downshifts into second gear when I'm bringing the car to a smooth full stop. This is in comfort mode. To the guys that disconnected their batteries...has that been a permanent fix for you? Also interested to hear from anyone who got the tranny TSB done.

 

[OnTheRoad]

I bought a used 2018 GT last week and I've put about 400 miles on it. This car is fantastic with my only complaint being this issue.

Im noticing a jerk in the form of abrupt engine breaking when the car downshifts into second gear when I'm bringing the car to a smooth full stop. This is in comfort mode. To the guys that disconnected their batteries...has that been a permanent fix for you? Also interested to hear from anyone who got the tranny TSB done.

I bought a used 2018 GT last week and I've put about 400 miles on it. This car is fantastic with my only complaint being this issue.

Im noticing a jerk in the form of abrupt engine breaking when the car downshifts into second gear when I'm bringing the car to a smooth full stop. This is in comfort mode. To the guys that disconnected their batteries...has that been a permanent fix for you? Also interested to hear from anyone who got the tranny TSB done.

For me the dealer said the problem (or more specifically my build date car) did not require that TSB, and so they only reset the adaptives, presumably by disconnecting the battery for 10 minutes. I think that resets ALL the adaptives from what I've read. But yes, going on over a month now since the reset and all stops remain smooth in comfort mode. The engine breaking when coming to a full stop feels barely noticeable now. Let us know if that works for you too!