Yesterday, I changed transmission fluid from Motul ATF6, took it for a drive and noticed while accelerating at lower speeds the car feels lazy, vibrates, and feels like it’s being held back. Car shakes also in some drive modes like S/M and reverse. Should I flush the entire system with OEM fluid? Not sure what to do.

 

Not trying to dissect your work here, but fist of all, can you explain your fill-up procedure for the tranny fluid? These cars require a specific fill procedure. Let's eliminate that out the way first.

 

Pulled the two plugs in the transmission, filled it up from the top, put a snap on scanner on it, turned the car on, got it to the optimum temperature, and some needed to be taken out. Do you have a PDF or what is the exact way?

 

Your way is just about the same exact way I'd do mine. I've done it the same for a dozen BMW 3 and 5 series vehicles already, and the F56 doesn't appear any different.

Below I found the official method from the NewTIS.info website, hope you can find any inconsistencies from the procedure stated within: https://www.newtis.info/tisv2/a/en/f...ion/1VnXzDJ0hq