Vibration right off idle

George Jets said
Tying to think how that lockup works, could possibly need power to disengage it and no power to engage it.

There are 2 pin or 3 pin wiring plugs on the trans to help identify what it is.

Yea it's a 3 pin circuit. The middle pin is 12v and the other two are OD and LU

George Jets said
Did you get an aftermarket converter for it or did you use the converter that came with the 42RH trans?

I just bought a factory lockup converter for a 92 Dakota. I wanted to see how it performed first. The two pin is non lockup.