i have a 2000 dodge dakota. transmissions fine, if i push the pedal half way it changes fine, no sound no thump nothing. but when i push the pedal all down it wont shift. why?
You can test it with a volt meter, but you'll need to find the specs for idle throttle position voltage and wide open throttle voltage. this is different for each vehicle model.
Here's a link that should help you out. http://www.ehow.com/how_4489318_troubleshoot-tps-sensor.html