2015 with 22k miles transmission problem? - Chevy Impala Forums
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post #1 of (permalink) Old 02-29-2016 Thread Starter
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2015 with 22k miles transmission problem?

I have a 2015 LT2 with right around 22k miles. I was wondering if there are any known issues with the transmissions in these cars, or if what I am experiencing is possibly normal.

When accelerating slowly there seems to be a slight hesitation/ shuddering. This problem is very intermittent and most of the time barley noticeable.

The other thing that happens pretty consistently is that when slowing down and shifting from second to first(right around 27-30mph), the transmission seems to shift hard. Hard enough that sometimes it almost feels as though some one lightly bumps me.

No check engine lights or error codes that I know of.

Again just wondering if anyone else has experienced either of these occurrences, or if because I just bought the car I am being overly analytical.
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post #2 of (permalink) Old 02-29-2016
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Quote:
Originally Posted by Bubba133385 View Post
I have a 2015 LT2 with right around 22k miles. I was wondering if there are any known issues with the transmissions in these cars, or if what I am experiencing is possibly normal.

When accelerating slowly there seems to be a slight hesitation/ shuddering. This problem is very intermittent and most of the time barley noticeable.

The other thing that happens pretty consistently is that when slowing down and shifting from second to first(right around 27-30mph), the transmission seems to shift hard. Hard enough that sometimes it almost feels as though some one lightly bumps me.

No check engine lights or error codes that I know of.

Again just wondering if anyone else has experienced either of these occurrences, or if because I just bought the car I am being overly analytical.

I purchased a new 2014 Impala 2LTZ - and it shifts very smoothly (up and down). The car now has 20,xxx miles on it.

I do not think your transmission is downshifting from second to first at 27-30 mph. It may be shifting hard - but not to first gear at that speed (unless you are manually shifting the car).

I would take the car to the dealer with your concern. There may be one or more stored trouble codes for the transmission that does not turn on the check engine light.
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post #3 of (permalink) Old 03-09-2016
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My 2015 2LTZ has the same exact issue when braking to
come to a stop. It seems to hold a high gear for just a little to long, then down shift quickly coming to a stop.

I think the above condition is part of the transmission tune, so that can be modified.
also, a tune will take out the lag on very light acceleration.

So needless to say, I may get a tune in the future.
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post #4 of (permalink) Old 04-19-2016
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I've noticed both of these problems, which started with less than 500 miles on the car. (2015 3.6L LTZ) The weird shifting on deceleration/coasting is more of a minor annoyance for me than an actual concern. Here's the post I just submitted to CarComplaints.com | Car Problems, Car Complaints, & Repair/Recall Information. Mine may not be live on the site yet, but there is one other complaint there for the same issue.

2015 Chevrolet Impala Hesitation: 1 Complaints

Post in case it's not yet live at the above link:

Bought the car brand-new. So many wonderful creature comforts and a powerful engine. I love nearly everything about it. I've been a Chevy guy my whole life (father worked for GM for 40 years), and I read all the glowing reviews from the car magazines and just knew I was buying the right car.

However, the transmission is an embarrassment to an otherwise near-perfect car. During the 1-2 and 2-3 shift, there is a significant delay between when one gear disengages and the next engages, resulting in a momentary loss of power/acceleration. This is particularly disconcerting when turning left across a lane of oncoming traffic. It feels like the car is going to stall. No other gear sequences seem to experience this same issue. I've tried the "manu-matic" shifting, and it has the same issue. Click the "+" to up-shift from 1-2 or 2-3, and there is a delay between disengaging one gear and re-engaging the next.

I'm no transmission expert, but it feels like one of two things to me: 1) There is a software issue that is attempting to make the shift feel "smooth" by inserting a hesitation into low-speed shifting, or 2) There is a design issue or manufacturing flaw that is not providing enough fluid pressure at lower RPMs to ensure crisp shifting.

I've had it in to the dealer twice for this issue, and they are unable to provide a solution. I've test-driven another 3.6L LTZ from the lot, and it had the same issue, so it appears to be a transmission design or software issue, and not an isolated problem with my car. I first brought it in for this issue with about 500 miles on the car. They were "unable to duplicate the concern", and suggested I wait until about 200 miles on the car to ensure the PCM had sufficient time to "learn". Well, I've got nearly 9000 miles on it now, and still the exact same problem.

The question I keep asking myself is, "How did this POS transmission not get absolutely destroyed by the C&D, Motortrend, etc. reviews?" I can't find a single review online mentioning the poor transmission. Chevy either gave them different transmission software, or this is a 2015 issue and the 2014s were unaffected. No way a pro vehicle reviewer doesn't pick up on this.

As much as I love everything else, I wish I had never bought this car. Friends and co-workers ask how I like it, and I have to tell them I don't because of the transmission. To not be proud of the beautiful, comfortable vehicle in my driveway because of a lousy transmission... This is not the kind of experience a new-car buyer should have.
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post #5 of (permalink) Old 04-20-2016
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Originally Posted by ght001 View Post
The question I keep asking myself is, "How did this POS transmission not get absolutely destroyed by the C&D, Motortrend, etc. reviews?" I can't find a single review online mentioning the poor transmission. Chevy either gave them different transmission software, or this is a 2015 issue and the 2014s were unaffected. No way a pro vehicle reviewer doesn't pick up on this.
Vehicles provided for auto magazines and other professional reviewers are thoroughly checked and tweaked by the manufacturers' engineers first, especially in the "segment shootout" or "X vs Y" type of articles.

2015 Crystal Red Impala LTZ V6
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post #6 of (permalink) Old 04-20-2016
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Quote:
Originally Posted by Bubba133385 View Post
I have a 2015 LT2 with right around 22k miles. I was wondering if there are any known issues with the transmissions in these cars, or if what I am experiencing is possibly normal.

When accelerating slowly there seems to be a slight hesitation/ shuddering. This problem is very intermittent and most of the time barley noticeable.

The other thing that happens pretty consistently is that when slowing down and shifting from second to first(right around 27-30mph), the transmission seems to shift hard. Hard enough that sometimes it almost feels as though some one lightly bumps me.

No check engine lights or error codes that I know of.

Again just wondering if anyone else has experienced either of these occurrences, or if because I just bought the car I am being overly analytical.


How have you resolved your complaint?
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post #7 of (permalink) Old 05-10-2016
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I have a 2016 Impala LTZ2, the transmission is the worse shifting transmission I have ever had in a car. I call it a mushbox. Always seems like it doesn't really know what it wants to do next. So far that's about the only thing I don't like about it. Just turned over 2200 miles. I would love to see a tune to firm up the shifts.

2016 2LTZ, Blue Velvet, Jet Black/Mojave, 20" wheels, sunroof, adaptive cruise, tech and convenience packages.
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Originally Posted by jonjonbear View Post
I have a 2016 Impala LTZ2, the transmission is the worse shifting transmission I have ever had in a car. I call it a mushbox. Always seems like it doesn't really know what it wants to do next. So far that's about the only thing I don't like about it. Just turned over 2200 miles. I would love to see a tune to firm up the shifts.
I have the Trifecta tune and it significantly improves up-shifting but still get ALOT of poorly executed downshifts.
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post #9 of (permalink) Old 05-11-2016
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Originally Posted by ICUBB View Post
I have the Trifecta tune and it significantly improves up-shifting but still get ALOT of poorly executed downshifts.
What is a Trifecta tune?

2016 2LTZ, Blue Velvet, Jet Black/Mojave, 20" wheels, sunroof, adaptive cruise, tech and convenience packages.
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Wow cool, thanks for the links. I had no idea you could tune these cars. I put a tune on my 2005 Mustang GT and it made a world of difference. Hell I would do it just for a better shift response. I hate spongy transmissions. Not that I want the Impala to bark the tires when it shifts but a little kick would be nice!

2016 2LTZ, Blue Velvet, Jet Black/Mojave, 20" wheels, sunroof, adaptive cruise, tech and convenience packages.
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I have a 2014 model with the 4 cyl - the bigger of the two. I have the same issue with the weird shifting. Noticed it the day I test drove it. The car is such a 10 in the looks department and other odd and ends but that transmission really drives me nuts sometimes. Especially at lower speeds in traffic - constantly up and downshifting, making the car hesitate and shudder a bit. My 04 Impala with 220,000 miles shifts smoother.
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post #13 of (permalink) Old 05-16-2016
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Back in the days of 2 speed power glide transmissions it didn't have so many gears to pick from. Our 2014 2LTZ sometimes has trouble picking which gear it likes best while driving about 25 - 35 mph. Driving faster or slower fixes that or else use the manual shifter. Our Impala has always had that slight shuddering while accelerating moderately onto the highway when leaving home. I think it is normal. We have 41,000 miles on it now. We just returned from a 875 mile trip to D.C. and then back home. It got 33.2 mpg going east and 30.2 mpg going back west. The wind was out of the west.
We have had no trouble with the car and are very pleased with it.
Patrick
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post #14 of (permalink) Old 05-17-2016
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Quote:
Originally Posted by Bubba133385 View Post
I have a 2015 LT2 with right around 22k miles. I was wondering if there are any known issues with the transmissions in these cars, or if what I am experiencing is possibly normal.

When accelerating slowly there seems to be a slight hesitation/ shuddering. This problem is very intermittent and most of the time barley noticeable.

The other thing that happens pretty consistently is that when slowing down and shifting from second to first(right around 27-30mph), the transmission seems to shift hard. Hard enough that sometimes it almost feels as though some one lightly bumps me.

No check engine lights or error codes that I know of.

Again just wondering if anyone else has experienced either of these occurrences, or if because I just bought the car I am being overly analytical.

How have you resolved your complaint?
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post #15 of (permalink) Old 06-25-2016
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My 2015 2LTZ has 34K on it, and nothing has changed. Its been to the dealer many times, and the feeling is that it does that to get the good mileage ratings. It upshifts waaaaaay too early, and the converter locks up way too early also; kind of like shifting a manual trans car early, and lugging the engine. The Trifecta tune did make a world of difference.

2015 LTZ, Racine, WI
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