This morning I had warmed up my B6000 to use the back blade to move some snow, and after I had got back on from opening the gate, I got about 6 feet and lost power accompanied with a spinning/grinding sound. I shut down and checked everything externally and found no problems. I started it back up and got about 6 feet and the same thing happens. It happens in every gear forward and reverse. To avoid any further damage I haven't got it back to the shop yet. Any ideas if it may be a clutch issue or the rear shaft of the transmission? Before I start tearing it down I wanted to see if anyone could point me in the direction to look first. It's a fantastic little tractor and I am just about to mount a FEL to it. Any ideas are appreciated. Thank you all for your help!