well after all my years I thought this one id share.... I work as a road mechanic for bobcat and thought I should star sharing what people who don't know IF YOUR MACHINE MAKES ODD NOISES YOU SHOULD STOP AND FIGURE OUT WHY IT IS MAKING THOSE NOISES lol so I had a 763 customer says its making this crunching noise as it moves.... well I show up on site and before im even out of the truck I see the wheel moving FREELY side to side like the axel articulates..... OMG so I jacked it up have a look and noticed that I can move both axels in the rear up and down a full 5INCHES!!!!!..... so after removing the rear tires I saw that the axel itself had worn through the sleeve busted the race and ROCKS had made there way into the chain case INSIDE the machine.... I have pics but don't know how to upload them as of yet lol