Hey everyone, My speedometer isn't working right my 91 Grand Am. When I speed up to aobut 40, the speedometer lifts to about 3-4 MPH. I replaced the speed sendor, thinking that was the problem, but it didn't fix it. I then thought that the speedometer cluster was bad, so I replaced that. Still hasn't fixed the problem. I don't know whats wrong! I know that the speed sensor is sending some sort of a signal to the cluster because it lifts off the peg... right? Anyone have any ideas as to what the problem is? I'm so frustrated! Thanks!