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Discussion Starter #1
2018 Premier, this issue has become more frequent lately and I'm not sure if it's mechanical or fuel quality.

The shudder generally feels like the engine is having a miss fire, yet I see no movement in the tach. It occurs under slight load, going up hill around 35-45mph with the tach reading between 1400 and 1500 RPM. At first I thought it was just rough road, but then it happened on a perfectly smooth road.

It's still under warranty, so I will take it to the dealership, but wanted to see if anyone else has had this happen, before I go there and they look at me like I'm stupid. I just know they will claim they cannot reproduce the problem.

Thanks in advance!
 

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I’m encountering this same problem.

I noticed it’s more apparent when you let the car idle for a while then drive off. I took to the dealer and there’s no codes in the car they can get for diagnostics


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Took mine in for an oil change and had them check on the problem, they did not find anything, no codes etc.. However, since that appointment the problem has gone away. They claimed it was the V4 mode on the engine that I was likely feeling, but why would it go away magically after the visit?
 

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Took mine in for an oil change and had them check on the problem, they did not find anything, no codes etc.. However, since that appointment the problem has gone away. They claimed it was the V4 mode on the engine that I was likely feeling, but why would it go away magically after the visit?
V4 mode? As in active fuel management with shutdown cylinders?

Your car has the 3.6 liter LFX. There's no AFM on that motor.

Not sure what the problem is/was. Back in the day, we'd say maybe you got a bad tank of gas :)

Doug

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Discussion Starter #5
V4 mode? As in active fuel management with shutdown cylinders?

Your car has the 3.6 liter LFX. There's no AFM on that motor.

Not sure what the problems is/was. Back in the day, we'd say maybe you got a bad tank of gas :)

Doug

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Zakly! I know when they're blowing smoke... :) I would normally concur on the bad tank of gas, but since it went on for several months, I ruled that theory out.

Jeff
 

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I'm not doing it for you but if you search the forums I have seen this issue dealt with before. To make it simple there is an unresolved issue with some of these vehicles and 1500rpm's.
 

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2018 Premier, this issue has become more frequent lately and I'm not sure if it's mechanical or fuel quality.

The shudder generally feels like the engine is having a miss fire, yet I see no movement in the tach. It occurs under slight load, going up hill around 35-45mph with the tach reading between 1400 and 1500 RPM. At first I thought it was just rough road, but then it happened on a perfectly smooth road.

It's still under warranty, so I will take it to the dealership, but wanted to see if anyone else has had this happen, before I go there and they look at me like I'm stupid. I just know they will claim they cannot reproduce the problem.

Thanks in advance!
Wished I had some useful information for you but I don't. However, I am not going to be rude to you and tell you to go look it up yourself. :( I know the search feature on this site can be frustrating if you do not know what exactly to search for, i.e. key words or topics.

Hope you get the answers you are looking for and please post any updates if you figure it out. Afterall, that is one of the reasons many of us are on this forum, to seek knowledge and pass information!
 

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x-mission 6T70 M7W

These transmissions are not exactly rock crushers, at first I noticed that @ 12k miles and I said to myself let me twist it up under warranty. After doing the tiptronic shifting at 5 or 6k rpm, especially through 1'st and 2'nd, in less than 100 miles I had heated up the x-miss quite so much (to 260-265 degrees in springtime) and burnt the clutches a bit. I still see that in automatic it is slow to engage the clutches, but the only time I get a shudder is holding 6th at around 2200. I kind of wonder if this beast even has a torque converter. The torque multiplication is piss, and it will not upshift out of first even if it hits the rev limiter at an insane 7k rpm.

I think you have the same as mine, but with small changes for fit and firmness that may eliminate the sloppy delay and cause the clutches to take longer to 'seat' and may actually worsen if they don't runnout some. MH2, I do believe, fits your app.
 
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