>I am searching for automotive speed transducer. ANy pointers


All new cars have them. Mine malfunctioned on my Dodge Caravan. Dodge called
it a "distance sensor" and it plugs into the transmission where the
speedometer cable would have gone on earlier years, and it has a gear on it
and a 2-pin connector. It has a place to attach a speedometer cable, for
compatibility for transitional models. Perhaps the car you want to attach a
speed sensor to can have its speedometer gear replaced with a later version,
like mine? You wouldn't need to build anything.

By the way, the retail price for my sensor was US$ 35. It has 7 or 8 poles
per revolution. I do not know how that relates to tire rotation.

-Bob