Hello, I have a question about the transmission in our automatic 2004 Jetta wagon. I never really thought about it until recently, but I've noticed that the torque converter doesn't seem to lock up when we're driving on the highway. I have VCDS and have done a few scans when we got the car (I had to do a fair bit of catch-up maintanence) and I can't remember the code but I know I had a fault for a bad tranny temp sensor. It wasn't high on the priority list, and eventually I forgot all about it. I assume that the torque converter should lock up, at least in 5th gear, but I'm curious as to the possible cause of the fault. Could it have anything to do with the tranny temp sensor? I didn't have any other transmission related codes. I don't know if the tranny fluid has ever been changed before so at 260 000kms it could be quite overdue, could that be the cause of the problem? It does take a moment to shift between drive and reverse gears, but nothing too drastic, and it up and down shifts smoothly. Thanks for any insight and advice.