New to threads but I wanted to try to post something out here to help. I have a 2002 lincoln ls with the 3.9 v8. The car was missing slightly for a while. One night on the highway it started slipping out of gear and the check transmission message came across the dash. I got it home and when idling completely normal, in park, the rpm gauge would jump erratically, took it to aamco they told me $2400 for a reman transmission... Well i dont have $2400... Long story short i changed the coils and plugs and its a new car.