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... Your car daily surges like that and you wouldn't be concerned at all? Not questioning, looking for honest answers.
My vehicle operates differently each and every day on the same stretch of roadway. How can someone be worried about that when it's become a 'normal' part of the driving experience?
 

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So nobody besides those who it's happening to considers it a concern?
In other words, if your car was doing this you'd ignore it? Your car daily surges like that and you wouldn't be concerned at all? Not questioning, looking for honest answers.
Based on the videos I'm seen in this thread, it is not something that would concern me. Especially if I knew it was controllable via lighter or heavier throttle.
 

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My vehicle operates differently each and every day on the same stretch of roadway. How can someone be worried about that when it's become a 'normal' part of the driving experience?
LOL; because it doesn't seem normal? And it's obviously not, as most cars don't do it. Normal is conforming to a standard, what the majority behaves like. Mine does not, otherwise you and others would report the same flare.
I've never driven a vehicle that flares frequently when shifting. Others who are on this thread same, so that indicates a potential issue with whoever has this oddity (we can stop calling it a problem I guess, as some feel it's not), no?
The mechanic who drove it feels it's a concern, the dealership is taking it as a concern, others here are concerned. If this wasn't a concern, I'm sure the dealer would have told me so. I never told them it was a problem, only asked their opinion. They drove it, they said it is a problem.
 

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Based on the videos I'm seen in this thread, it is not something that would concern me. Especially if I knew it was controllable via lighter or heavier throttle.
So I shouldn't accelerate with traffic? I should intentionally drive my car not the way that I'm comfortable with to avoid that RPM range? Sorry, that is ridiculous. If the GMC dealer told me that I'd be very disappointed to say the least. I'm just driving to and from work, etc.
An example if I may exaggerate; if I told you to avoid between 2000-3500 RPM range entirely, you'd find that acceptable? 2500-3000 is pretty much where my car ends up with in daily traffic.
Anyway, not meaning to argue with you gents, I just have a hard time believing you wouldn't take your vehicle in with this symptom happening daily in regular daily driving.
 

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2500-3000 is pretty much where my car ends up with in daily traffic.
This is a statement I do not understand. Just did a 20 mile drive to a client. A combination of stop/go rush hour traffic and open highway. I made it a point to keep an eye on the tach. It never once went higher than 2300 rpm. I don't think in 22k miles of driving my '18, it has ever seen 3000 rpm. The flare issue may well be related to driving style.
 

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Gee, divotdug, my Acadia saw >4500 rpm on the test drive. The engine routinely gets to over 3K rpm in 2nd gear pulling the ~6% grade HiYo has to climb immediately after leaving the driveway.
 

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This is a statement I do not understand. Just did a 20 mile drive to a client. A combination of stop/go rush hour traffic and open highway. I made it a point to keep an eye on the tach. It never once went higher than 2300 rpm. I don't think in 22k miles of driving my '18, it has ever seen 3000 rpm. The flare issue may well be related to driving style.
Not higher than 2300 RPM on a 20 mile combined city/highway drive!? I think your tach is broken. LOL. Seriously, no idea how that's even possible.
I just got a brand new (~300 miles) loaner 2020 Caddy XT4 while my Acadia is in for repair. Regular drive in to work the tach hit easily over 3000 RPM a couple times. Now that's only a 237HP motor, so it's gonna work a bit harder.
 
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Hi all,
Just finished reading all 109 posts. From the sounds of it - there is no definite fix? Has anyone had a transmission completely fail over the 2-3 flare?

Just bought a '17, neither the wife nor I noticed it on separate test drives. I noticed it on the drive home and then let the wife drive it - she couldn't duplicate it and neither could I. Seems to not occur when its cold or at operating temp - only when it's warming up?

At the dealer now and it's under warranty...we will see what they say. She's very impressed with the Acadia otherwise....but it seems like we lucked into finding it's weakness!
 

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I don't recall reading anyone who's had the 2-3 flare actually having a transmission fail. And kinda hope it doesn't lead to further issues.
Just got my '19 (4000 miles so far) back from the dealership today, then went straight to the ski hill. Actually didn't notice the flare, but it's not typical daily driving.
 

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I don't recall reading anyone who's had the 2-3 flare actually having a transmission fail. And kinda hope it doesn't lead to further issues.
Just got my '19 (4000 miles so far) back from the dealership today, then went straight to the ski hill. Actually didn't notice the flare, but it's not typical daily driving.
Thanks! What did the dealer have to say about yours?
 

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It was pretty long winded, but essentially they have a claim in with GM engineering. A TAC IIRC.
I'll pull the print out tomorrow and post more info. I understand only some adjustments were made, and I have to report back next week if it's better.
 

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Full transmission replacement on my 2017 Denali FWD with the flare and it still does it exactly the same.

Frustrated and likely just moving on from this car. 36k miles.
 

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They updated the program on mine. I still get a small flare occasionally on light-medium throttle at 2300-2400 RPM, but it def feels less. At this point they have noted they could replace the valve body, but it's a tranny removal thing.
I took the head mechanic and main tranny guy out for a spin, they feel I may be laying off the gas right at that point. Have asked me to drive it for a while, more aggressively if possible.
I'm not super concerned at this point. Give it some time...
 

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They updated the program on mine. I still get a small flare occasionally on light-medium throttle at 2300-2400 RPM, but it def feels less. At this point they have noted they could replace the valve body, but it's a tranny removal thing.
I took the head mechanic and main tranny guy out for a spin, they feel I may be laying off the gas right at that point. Have asked me to drive it for a while, more aggressively if possible.
I'm not super concerned at this point. Give it some time...
Hey Grantv,
Do you know what they actually did for the reprogram, was there a TSB or firmware number that others could take to their dealer to get this update? My 2017 is doing this and I am worried that it doesn't happen frequently enough for the dealer to catch it, would be nice just to tell them about the update and get it done.
 

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Hey Grantv,
Do you know what they actually did for the reprogram, was there a TSB or firmware number that others could take to their dealer to get this update? My 2017 is doing this and I am worried that it doesn't happen frequently enough for the dealer to catch it, would be nice just to tell them about the update and get it done.
I don't recall, and don't know off hand where I put the report. I will look for it, sorry for the slow response.
 

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Awesome thank you so much for posting the information. I feel like this problem is so hard to prove at the dealer but it doesn’t seem right that these transmissions are acting this way. Sometime they shift so nice and smooth that’s it’s a shame that these flares pop up.
 
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