E60535i2010

When driving very light under 1500 rpm it’s like there is nothing, however accelerating from almost complete stop or stop is very rough vibration from under the arm rest. Changed trans fluid, mechantronics, mounts and guibo looks good. Issue was very light vibration in second gear at first between 2500 rpm and 3000 but I decided to reset the trans ecu with the gas pedal truck and immediately it became worse. Now I can feel it in first into second and into 3rd it’s quite. Highway speeds are normal, shifts are smooth and sport mode is same. Only when under load. No check engine codes, no misfires or vacuum leaks or engine related issues. Definitely drive train. It used to pop out of second gear when rolling to a stop before and display drivetrain malfunction message. Now I only get battery discharge message in the morning if I don’t drive for a day. Any help would be appreciated as I have checked every forum out there with no luck. Axles are good too by the way. It’s a rear wheel drive with 115k miles with the sport transmission m sport package.

habbyguy

Did you check or change the center support bearing on the driveshaft?

How do the differential bushings look? They do wear out and can cause issues like you're having.

Also, any of the other rear suspension bushings or ball joints that are really worn out can cause this kind of issue as well.

E60535i2010

Center support bearings are to be addressed today to see if need replacing or eliminating. Will keep you posted. Thanks for the response