I have a 1973 Troy-bilt Horse. The drive axle has quite a bit of slop that I never noticed before. If you hold onto the handle and move them to the left or right, the wheels obviously stay stationary, but the axle moves in and out about a 1/4 inch. Shouldn't that axle be pretty tight with minimal movement? I have the owners manual which is fairly detailed but it does not mention anything about this slop. Any ideas as to what may be worn out? It does drip a little oil from the axle seals, but not as much as I would expect from this much slop. This machine owes me nothing, and I am not surprised that something may be worn out. Truly an amazing machine.