[ScottyB]

So I replaced the rear end of my transmission with the rear end of another stage 1 4EAT. I replaced the clutch basket (the whole assembly shaft that it's attached to), the clutch pack, and the rear case with solenoid C. However the vibration still exists. It doesn't start till a little higher speed (~45) but it's still there.

So basically I've brought the car to 3 shops and all said that the driveshaft or transfer clutch were to blame. I replaced both. The problem's still there.

Could the TCU cause this?

I think my next step is to set the car on fire and run it off a cliff.