No speedometer reading
 

No speedometer reading and no up shift P0700,P0500,P1782,P0731. i replaced the out and input senors. still know speedometer and up shifting. i even tried alternator field-test removal.i hope it was the plug and not the B+ wire, that was to be removed. But when i was replacing output sensor(VSS) there was a piece of metal on the magnet. Didn't drop pan yet that's coming next.

you'll need to get access to an oscilloscope or a scan tool that that can read live data.

Confirm that a signal from the input sensor is being seen and understood by the EATX and again for the output speed sensor. You may see a small AC voltage from the sensor if you only have access to a multimeter.
I would also suggest that you check the wiring from the sensors to the EATX

A piece of metal on the output sensor is not a good sign though.

year make and model are we talking?