my tranny is driving me nuts. When driving at higher speeds, 90mph+, feels like something is loose under the car. I lifted the car and all is tight. It feels maybe like the damn input shaft is maybe rubbing on the pilot bearing? When the car idles, I can hear a slight knock, ant it is coming from the drive train. I wonder if I should take this car to the dealer and have it checked out. I did a tranny swap a few years back so I am not sure if they would be able to help.