Hello everyone I´m new and have a problem that I could use some help with. I own a ´95 4 door with 107,000 miles and about 50% of the time when I go above 65 MPH the speedometer starts going all over the place. Is there an actual cable on these or are they totally electrical? If there is a cable, how hard is it to fix/replace? Any help would be greatly appreciated. Thanks.