Speedometer problems

there is a small coiled spring behind the speedo face and is staked to the housing with a small metal beveled pin. you might be able to see it without removing the 3 rivets holding the face on. Ill see if I can get you some pictures of it.


I've looked all over for a problem like this but can't find one. When I test my speedometer with the drill, it goes all the way over but doesn't return back." New cable". Needle flip flops with the direction of the drill. Is there a return spring that might be broken?