vibration

Hi, just got under my 2002 3.8l mustang for a routine oil changed and noticed something strange. A part (that I believe to be the harmonic balancer) is completely loose and moves almost freely back and forth on the crank pulley. I can push it back into position and it feels semi snug but I'm...

Hey guys, I'm new to this forum, I've always loved mustangs, and I finally got one. It's a 91 lx hatch. I've had some trouble with it, but I have most of the problems fixed except for this vibration one. The shifter will vibrate like hell above 3000 rpms, whether I'm sitting still or going down...