Ok my 1995 XP 800 Drive shaft bearing gets so hot the grease drips out of it after about 5 mins of running it hooked up to a garden hose. I have used the alingment tool it is aligned perectly, the bearing is brand new and I have replaced the drive shaft what else would cause this to happen? is it possible the impeller bearings are bad? I have also heard of some sort of carbon seal that replaces the carrier bearing all together PLEASE HELP