Vibration 45-50

All good advice. Especially if you don't do it yourself, you don't really know what you have. I get that. The vibration comes on in 4th at 40+ mph, it's in the seat, steering wheel, etc. It's like a switch is flipped and the whole car vibrates. I just don't know why it goes away when putting in Neutral. I'm thinking the transmission is the cause only because it whines in ODrive.