Using my tractor today , it had been sitting for several hours when I returned and looked at the fluid level gauge for the transmission. It was completely empty. I moved the tractor around the yard some, then looked and the fluid was half way the gauge. Of course the tractor was on flat ground and engine off when I check it both times. The fluid in the gauge looked very clean. Not dark at all. (34 hrs on tractor L3800 hst)