Help! Speedometer is acting crazy!

[1990AWD]

This morning everything was fine, until I had my boss drive my car to come get me and now my speedometer is messed up. He didn't notice anything when driving but he had never driven the car before.

The speedometer goes up and down linear, but about 1.5 times as much. It'll show 80 when I'm doing about 50 and 160 when I'm going 100 km/hr.

The car drives normal and there is no vibration. It's not acting like a cv axle or a slipping clutch (I've had both before on different dsms).

What's going on?? This is my only vehicle so I need it working asap.

 

[90TSI717]

Could possibly be the speedometer cable. My old GS did that exact same thing but had a noise with it as well.

http://www.dsmtuners.com/forums/newbie-forum/87227-replacing-speedometer-cable.html

 

[1990AWD]

Could possibly be the speedometer cable. My old GS did that exact same thing but had a noise with it as well.

http://www.dsmtuners.com/forums/newbie-forum/87227-replacing-speedometer-cable.html

Ok thanks. I'll take a good look at it tomorrow.