Need advice on 57 speedometer

[dan1520]

My speedometet in noisy and is jumping between MPH indicators. I haven't driven the car for a while and it's been sitting in the cold garage. I hate to remove it cause it's a bear to get behind the instrument panel with the seat in place.

Is there something I can spray inside the unit like WD40 and will that work?

Any ideas would be appreciated.

Thanks