every couple of days my speedo rolls all the way around I dont know if the pin is broken and sometimes it jumps over when its sitting on zero or what .. has this happend to anyone else .. i fixed it once and now the car is back together lol i dont want to take it back apart but I guess I have no choice if i wanna know how fast im going.

 

very common problem... usually its the cluster and not the speed sensor on the tranny...

but only way to check is if you have another working speed sensor or another working cluster laying around to swap out and test...