well ever sice i have gotten my truck i have had bad luck withe the speedos, the first one was crap and i switched it with onother one, well this"new" one goes crazy im like going 50mph and its pointing at the 90mph, and it just moves around constantly. do u have to lube it or something??? it seems the bearings are loose?????help me plez!!!!! I DONT WANT TO START MY FIST MONTH WITH A LICENSE BT GETTING A SPEEDING TICKET!