I have a LA110 with the Tuff Torq T40. I have been noticing that its been slowing down more and more on the hills. Finally its to the point that it will not go up any hills and will not acheive full speed. I serviced it at the beginning of the season with 5w50 synthetic like recommended. When it was stuck on a hill, I looked under the fenders while pressing the pedal down and it doesnt appear that the belt is slipping any, although the drive belt is still original, the pulley is spinning good. I have read that these are not the most robust units. This one has 206 hours on it. It seems to get worse after it gets hot. Am I dealing with a failed unit or is there any hope for it. Also is another unit that will fit this tractor and is there a good place to buy another t40. I would hate to throw the tractor away, its in great shape other than that.