I've got a 1980 Wheel Horse C-145 with the 8 speed trans. When I bought the tractor two years ago it has some water in it because the shift boot had some dry rot and someone left it outside for several years. I changed the trans oil which got most of the water out but I'm switching over to a sythetic gear oil for this winter and I'd like to flush it out really well. Can I fill the trans with kerosene or diesel and drive it around the yard for a few minutes before putting the gear oil in? I wouldn't think it would hurt anything since it would be quick but I thought I'd get some other opinions. Which would work better, kerosene or diesel?