I HAVE A 1997 MACH, THE SPEEDO HAS NOT WORKED FOR A WHILE. IT WILL GO TO 55 OR 60MPH AND STOP. THE CARS I'M PASSING ARE GOING 55 TO 70 MPH, AND I FLY BY THEM. IS IT THE DRIVE GETTING STRIPED, OR IS IT THE SPEEDO???? ANY ONE ELSE HAVE THIS PROBLEM PLEASE LET ME KNOW. DON