My speedometer is always 10 miles faster then what I'm really going.

if im going 45 it reads 55 and so on.

I need help on fixing this.

Truck has original tire size and tranny as far as I know.

I've tried searching everywhere for a fix to this problem

any help would be greatly appreciated.


Also I need help on how to adjust the Headlights. They are sealed beam.


and on how to drain water from them.

Thank you in advance.