Good morning, I'm new to this site and would first like to say that the information posted here is fantastic. I have yet to find the topic that talks about the vibtration problem Im having right around the 40 mph mark while in 5th gear. I have seen several posts for the TL but not for the TSX. I have an 05 TSX, automatic, with appx 100k miles on it. The car drives and shifts great however while travelling on a slower stop and go street that averages about 40mph, my car begins to vibrate and feels as though it is in the wrong gear as would a standard vehicle when travelling at low rpms in 5th gear; this happens while I hit speeds of around 40mph. I've read of motor mount issues, and even 3rd and 4th gear shift sensors but again on TL's only. If you all can point me in the right direction or you've experienced this and fixed it, your help would be greatly appreciated.