Stokestack

Hi all.

I noticed I was supposedly going 96 miles an hour on a busy highway a few months ago. As if! Since then I've noticed the speedo reading crazily high on the highway once in a while, and sometimes low around town. The thing's clearly going bad.

This is a '96 Cobra. Anybody have experience fixing this kind of problem? I'm not against taking it apart.

I'd like to keep the stock look, so if replacing it with a more-reliable technology is an option, it'd need to use the stock gauge. Thanks for any insight!

Gavin

go-part

http://www.allfordmustangs.com/forum...o-problem.html

http://www.svtperformance.com/forums...-way-fast.html

Stokestack

Thanks for that. I'm going to have to check the things mentioned in that first thread:

Bad VSS sensor.
Bad/worn gears driving the VSS sensor.
Bad wiring (short, stray voltage on GY/BK wire or loose connector)
Missing/weak ground on the PK/O wire (G201 located behind I/P at RH Cowl).
Bad alternator diode causing exessive AC ripple.