Sweet, had the same issue on my 36-1 VR setup and adding resistance to the VR+ side fixed mine. Glad you got it sorted
Journal bearing turbo i'm assuming? I've heard the same do/dont run a restrictor but a call to the mfg said no restrictor on a journal bearing turbo. If you get smoke your drain is not sufficient.
Is your tranny mount solid steel? Or is there an insulator in there that I don't see?