If you've known the speed sensor is defected, then buy a new one, make sure the application is corrected (ie: Manual or automatic, year, model ect..)Look around the trans. and you'll locate the defected speed sensor by compare with the new one in your hand; please make sure that they are exactly look the same and installation is easily done. Any question before remove and installation? Please E mail me. I'm here to help with no other intentions. Thanks!