Why would my speedometer for a Volvo 1990 740 GLE wagon not work?
Check the wires on the back of the rear axle. There is a sensor there for the speedometer. If the wires break, it will not read any speed or distance. I have had to repair mine twice. The sensor is on the drivers side of the differential to the rear. Hope that is it.
Figure out the anti swaybar travel when you repair the connection to the sensor