i have a 91 auto s5, the tranny when bad so i put in another used one in. when i put every back togther and plug in the wire, everything run but when you put it to drive or reverse it doesn't move at all. also when i pull out the tranny i try spining the torque converter, it spin but not smoothley can that casue the car not too move. any idea guys.....

 

do you even know if the "used" tranny was good? where did you get it from?