Shutter

What is your question?

I bought a 2011 BMW 328i xdrive and I inherited a ton of issues wrong with the car.i fixed the regular maintenance issues with the car but I have one problem that I seem to not be able to fix, I recently bought a part out Transfer case for my vehicle and had it installed. The problem I have is that I have a bad shutter problem in my car when the car warms up my car seems to want to start to shake and shutter when I accelerate from like 35-45 to 50 and anytime I hit a certain RPM from a slow speed to a high speed. I’m not sure what I need to fix in order to stop my shuttering issue. is there anyone that may know what my problem is? Thank you

What makes this problem better or worse?

It gets worse the more you drive the car.

How long has your 2011 BMW 328i xDrive had this problem?

More than a month