Window Crank Knob Wobble

I don't know if its the same, but my 65 barracuda had the same problem. I took it off and it looked like it was stripped of the threads. As I looked at it I noticed that it looked like a piece of foil was wrapped around the threaded post. I removed the foil and the threads were in good shape.I replaced the handle with no wobble or looseness at all. Good luck
Tommy