The tranny uses a VSS (vehicle speed sensor)to change gears, amoungst other things. If the sensor has gone you loose your speedo and or your tranny will be thrown into confusion. It is mounted in the diff, once I had Fords do some work on the tranny only to find fluid squirting out of the speedo cable. It was traced to the oil seal on the VSS sensor. perhaps yous has come loose, seal gone / got covered in oil and packed up?
Worth a look.


5 Dr, 2.5 V6 Ghia X, 1999
Modifications:-
Inventor of the inductive Secondary monitor
Chrome grill
JR cone air filter
Black Diamond cross-drilled & grooved discs with Predator pads,
ST200 throttle body, upper and lower extrude-honed intake manifolds
Scorpion s/steel exhaust

Current Project.. Building a ST200 powered MKI
paullorman@btopenworld.com