The Guibo is also known as a flex disk and is located between your output tranny flange and your driveshaft. If your drive shaft is out of allignment, it puts stress on your Guibo and could result in vibration and eventually the guibo will need replacing. you can replace it but you should check the drive line allignment so you don't go through alot of Guibos. There are people on this group that can explain this much better than I...