[DADPAID]

As the title states, my 335 has been shaking hard as of late when accelerating under load. This mainly occurs when I'm full throttle but not past the kickdown. There's a very noticeable vibration that doesn't go away as long as you stay on throttle. I've seen some threads referencing misfires due to plugs/coils but this almost feels like a transmission issue as the motor still seems to pull cleanly and i have no lights/codes. For reference, I'm at 67k on stock tune/plugs/coils/etc. Has anyone had a similar issue? Thanks in advance for any info!

[DADPAID]

To clarify- the reason I believe this is a transmission issue is because I've only noticed this in the past couple months after my trans fluid/filter were changed. Further, the vibration/shaking seems to happen as the car lurches forward and then stops- almost like the trans grabs and then releases over and over. Any experience I've had with a slipping auto trans results in RPM but no movement, but I really have no other ideas as to what could cause this

[thejeremyman9]

Check trans fluid level following ISTA procedure

[DADPAID]

Fluid level is fine, I checked it recently after noticing this issue- if anything the level was slightly over full and the fluid still looks brand new (no clutch material or other contamination). I think on the initial fill after the fluid change it was slightly low, but I only drove a mile or two before getting back home and topping it off so I cant imagine that being an issue.

For reference, this is the closest thread I have found but unfortunately there was no solution posted.

https://f30.bimmerpost.com/forums/sh....php?t=1516329

EDIT- Decided to get an xDelete license based on some other threads and magically my issue went away... lets hope a fluid change is all I need otherwise this could get expensive fast