Did a six speed swap and now my speedo dose not work. I also tried my old speedo drive gear and still no work.

 

When spinning the sensor by hand in free air, the speedo works?

 

The sensor felt free and the speedo work before i put the six speed in.

 

ill try later when one of the lifts are open at work.

 

I fixed the problem turns out the speed sensor gear was the wrong one that came with the tranny. I used my old 5 speed gear sensor and boom works thanks for the help joe.

 

wrong speedo gear? less teeth? I have no experience with the miata speedo gears however on my old vehicle you had to spin it a bit to align it when you swap in a more or less teeth gear. When you swapped in the 6 speed did you do any other work to the rear end? I'd double check my speed with gps just to confirm its reading somewhat correct.