"anyway, it can be fixable with some epoxy and patiente... If I find the pics around, will post."

"The bushing not only keeps the needle shaft in place but also keeps a light pressure over the tension spring lever ( which is a spring too ), and melted on back to keep in place that."

Same thing happened about twenty years ago to my speedometer on my 68 Coronet. It's that bushing in back. If it comes out or gets missaligned
, will cause the needle to stick in one place. As mentioned previously, JB weld and reposition the bushing was the fix for me too.
Easy fix. Just got to get the instrument cluster out to do it.