[afat17]

I have a 2019 M340 and it has 75 thousand km. Strangely, when the gas is released in the first 3 gears, my vehicle increases the rpm and then decreases the rpm. I took my vehicle to the service, but they could not detect what was happening. I wonder if anyone who has an idea or has experienced this can help? I tried to put the video in the most obvious way.
http://www.youtube.com/shorts/0En5l47AR_Q

[Prophet26]

This looks perfectly normal.. Most lower gears will have a “harsher” transition from open to closed throttle especially if you pull your foot off the pedal quickly. This would seem even more dramatic in first gear. Is this affecting your day to day drivability?

[afat17]

It does this even at low revs, not just in sport mode. Also, even if I slowly take my foot off the gas, the rpm increases, then the required rpm drops, it increases by about 100 rpm, which is why the vehicle shakes.

[Prophet26]

Originally Posted by afat17

It does this even at low revs, not just in sport mode. Also, even if I slowly take my foot off the gas, the rpm increases, then the required rpm drops, it increases by about 100 rpm, which is why the vehicle shakes.

Do you have video of it doing this in comfort and not in manual mode? I drove my car today and thought of this post and I can recreate exactly what your car does in your posted video. If it does it while not in manual at very low revs then perhaps there is an issue. But the video you posted is 100% normal behavior.

[afat17]

It is not normal because I tested my friends' 435 and 340 and there is no such problem. I wonder if it is time to change the oil, or whether it is related to the transmission software or a mechanical problem. New video here.
https://youtube.com/shorts/Zdl_Y2Kpg...j6QExbnXXnefzA

[afat17]

Has anyone experienced this or have any ideas? Do I need to change the transmission oil ? I don't know how clear it is in the video, but the speed increases unintentionally and then the required speed drops, the same thing happens when giving gas or shifting gears.

[seccsc]

Originally Posted by afat17

Has anyone experienced this or have any ideas? Do I need to change the transmission oil ? I don't know how clear it is in the video, but the speed increases unintentionally and then the required speed drops, the same thing happens when giving gas or shifting gears.

Well, I had something similar on my ‘07 E90 335i and executed solenoid replacement on the transmission valve body. It was resolved. I concluded the solenoid was not maintaining the proper pressure on the transmission clutch plates for that gear.
Do you still have a warranty?

[afat17]

unfortunately no

[seccsc]

Originally Posted by afat17

unfortunately no

Ugh. You can always pay BMW the diagnostic fee and see what the issue is. Confirm the problem. The car will be fine for right now.

[afat17]

Unfortunately, the BMW authorized dealer could not find the problem in the vehicle. But I think my problem is due to the solenoid valve. What you said makes more sense.

[seccsc]

Originally Posted by afat17

Unfortunately, the BMW authorized dealer could not find the problem in the vehicle. But I think my problem is due to the solenoid valve. What you said makes more sense.

Years ago I made transmission valve body rebuild DIY for a 6 HP tranny. It is probably similar to these 8HP transmissions.

https://www.e90post.com/forums/showthread.php?t=1318219