Tenac wrote

No not normal at all, the only time I can feel a shift is in sport or sport +. Take it to another dealer.

X5_CC wrote

Agree the acceleration roughness is not normal — upshifts for me are very smooth. However, I do notice that the downshifts when slowing down to a stop are noticeable and a little annoying.

dan321 wrote

Jerky acceleration isn't right. There are a lot of things that can cause jerky acceleration. I assume that when the dealer had the car, they found no error codes? If you can't reproduce it, I don't know how you will get it fixed.

I'd suggest logging each time it occurs in a notebook. Include time, duration, speed, conditions, and your description of the roughness and anything else you think might be significant. Then go back to the dealer with the log, and maybe you can get the dealer to fix it. You will probably have to be persistent.

Ringo2712 wrote

The tranny on my 40i Sport is not running smooth. When it changes from 1st to 2nd and 2nd to 3rd under normal acceleration it changes rough. Under moderate to hard acceleration it feels normal. Also when slowing down and the gears come down is very noticeable like if it was a manual tranny and you can feel the car holding down.

This is my third X5 and never felt anything like this on my previous ones or any other car I have driven. The dealers says is normal because the tranny has been improved over the F15 one which I think is totally BS....no one improves for the worse.

I was wondering if anyone has experienced this kind of behavior with their tranny's?

mnx5er wrote

There is something up with the transmission in odd cases. If I’m in sport mode and come off a freeway slowing down, then accelerate hard on a turn the X5 kind of lunges on and off. I’ve had this happen a few times on hard accelerations coming off high gears. It’s an odd end case, otherwise it is smooth.

gofast182 wrote

Smooth on acceleration. Some jerkiness on downshifts when decelerating no matter what drive mode I'm in. It's slightly annoying.

semibypass wrote

Here is my personal observation of the problem. I have ~4000 miles on my 2019 X5 x40i. All my observations are coming from information collected from a 4K DVR and a relatively fast GPS receiver for speed measurements, and a fast and sensitive accelerometer/motion processing unit in my vehicle (a cell phone accelerometer is too slow to register this kind of problem).
First, it is not really a physical transmission problem (at least not that I have noticed yet). I would call it a “bug” or gremlin inside the Front Collision system and Parking Distance Control system, and in the Automatic Emergency Braking system.
This bug is causing improper information processing from KAFAS and ultrasonic sensors, and possibly the front/side radar sensor (but I can not support the last part of this statement, because my vehicle does not have it), causing a short period of de-acceleration (approximately in the range of 0.1-0.3 second). This de-acceleration itself is just a beginning of the problem. The adaptive transmission algorithm is learning this improper behavior and making it much worse.
I know a some people on this forum also reported a jerky de-acceleration in traffic, jerky cornering at low speed, and absurd behavior of the Auto Start/Stop system in near-stop conditions or having the engine randomly engage when perpendicular traffic is crossing ahead. It is likely some of these problems have the same root and caused by same gremlin.
The reason why this problem is so random is because it involves so many factors: the Driver Assist package your car has, the presence of the traffic in your daily commute, type of the traffic, consistency of the traffic conditions in your total commute, distances between your car and those front of you and the cars on the side of you, the speed of your vehicle, the speed of other cars around you, and also depends greatly on your style of driving.
The reason I am saying this is because the time frame for this problem to manifest is very short. I my case this occurs when I accelerate slowly, the speed of the vehicle is less than 20 mph, and there are cars around of the vehicle. Based on the data collected from my GPS and accelerometer the “JERK/JOLT” appears in between the gear switches, and not with the gear switches as I had thought originally. After the problem was learned by the adaptive transmission algorithm, the car can develop this behavior even in the absence of some of these factors and may, for example, start doing it several times in a row during acceleration.

Unfortunately no dealer nor BMW NA seem to really care or are not capable of fixing the problem in my experience!

A SOLUTION, although short term, to this problem is to the reset of the Adaptive Transmission. It is not fixing the root of the problem and will not gives you long term relief, in my experience, unless you are generally alone on the road.
But at least it is better than to live with the great wall of silence and complete incompetence in regards to this issue from BMW NA and some of their dealerships.