its old
the speedometer wont work and quite likely the automatic transmission fluid or oil (manual trans) would leak out and the transmission would be ruined.
wish i knew have the same prob on my 93 377 peterbilt
because your car is broken
It wont start
Speedometer can determine a car's normal and maximum speed.
Check for a blown fuse.
get a new one
Check VSS or wiring to it could cause fault .does speedometer work?
you replaced speedo, so try replacing speed sensor
Speed sensor. There is not a cable on this car.
well that's not to hard to answer. my truck did the same thing i replace the speedometer cable and sensor in the transmission and i never had that problem since. try that first and see what happens if that wont work then replace the speedometer panel in the dashboard.