So driving to work this morning I noticed my speedometer was stuck at 60 no matter what speed I was doing. All the other gauges were working fine (tach, etc). Odometer was working too.
When I got to work and turned off the truck it still stayed at 60 (see pic). When I got back in the truck to go home and started it up it was sitting at 50.
Driving on the highway it would go up to 110-115 (I was going along with traffic) so I figured I was really going 60-65. Pulled in turned off the truck and it stays at 50.

Is this a mechanical issue or something else? Would unhooking the battery help any? Any help is greatly appreciated as I don't want to take it to dealer and have them charge a ton of $$ if it is something I can fix.


Truck turned off

Driving the highway home