My car has a vibration coming from the under carrage, ive checked motor mount, harmonic balancer, tranny mounts, it flashed code 36 but I dont know if thats were its coming from, I figured a knock sensor code would flash with all the vibration, it gets worst at 1500 rpms. I also check my torque converter for cracks or missing weights but have found nothing. Im stumpt does anyone here have any idea where this vibration is coming from? Ill try posting a video tomorrow.