On my new project truck, 04 F150 supercrew, of course it had the flaky speedometer.
I went with a speedometer service that I found on Ebay.
if you have ANY speedometer issues I have to recommend them. Super fast turn around, they received on a Thursday and it was on its way back the next day.
I just put it back in and drove it around the block and everything is fixed.


Good Service,
Good Price,
And it works.

 

Outstanding! thanks for the post.