Hi everyone, I have been driving my D around for awhile and before hand I had gotten a new angle drive and has been working fine. But when I slow to a stop my speedometer stops at 5 mph. If I tap the window the arrow goes down below like it should. The other thing is that if the car sits for a while (ie overnight) the arrow is back to normal. Is there an unlying problem if I don't do something. If I need to oil the thing too. How do I do that?