I was out plowing snow this morning with my 1204 and working it pretty hard as we have 20" of new snow. as im going along plowing in 4th gear i start loosing ground speed. stop the tractor and hit reverse and back out try moving without a load on the tractor and it is moving real slow til it actually stopped. I am by no means a mechanic so im asking for advice or ideas. Am i assuming correctly that this would be a peerless unit also. and are there any good options for a replacement?