I have a '99 Durango with 118,600 miles on it. Recently the check engine light has stayed on. I brought it in for service and they said it's giving a P0720 engine code. Now it appears they have diagnosed it wrong, they gave this:
"CODE PO720 - TORQUE CONVERTER CLUTCH, NO RPM DROP AT LOCK UP"
I was told buy some guys in the thread below that it was a generic error code and really all I need to do is replace the output speed sensor. Now I have just gotten back off the phone with the shop and they claimed they "went into the Dodge error codes" and this wasn't a generic code. He said he'd be shocked if this speed sensor fixed things. There are no real noticeable symptoms, perhaps a bit late shifting but not sure if I'm making that up.
Thread on alt.autos.Dodge.trucks