the other day my odometer and trip quit working, nothing has been done to the car except had 4.10 gears put in about 2 months ago, not sure were to start looking, I have the Ford Racing speed cal to put on but want to try and fix this problem first, 1996 gt 4.6 auto, the speedometer and tach work correctly, thanks for any help
My guess would be the little gears in your speedo. I know latemodelresto has replacements, I'm guessing others probably do too. It's an easy fix, just have to pull your cluster out and replace the gears.
I had that happen in my 98, just like they said above me its the gears breaking. Its very easy to replace and are inexpensive. If you need help just post up and we'll help you out.