Although in theory the transmission doesn't move in relationship to the frame, I would be pretty nervous about running things that close. If over time the polyurethane mount compresses slightly, or on a hard launch the engine/transmission torques a bit in one direction, you could grenade the transmission case. ----By the way---the yolk looks like it is too far out of the transmission housing. Optimum distance with suspension loaded (under full weight of car) is about 1" from the end of the tranny case to the back of the yolk.