Has anyone had any problems with the front differential on a 2011 825i? If I put my gator in reverse when I am in a low traction situation or am stuck, the front end of the machine chatters so bad it feels like everything is coming apart. I only have 150 hours on the machine, it is never off road and most of the hours are me giving rides to the grandkids! My dealer said they'd have to take the front differential apart and check it out and it could cost upwards of $1800! the bad thing is the extended warranty expired in mid october! Any help would be appreciated!