Where does it go?

[BFrank]

So we were heading to the lake for the week and I'm doing the fluid checks and notice my tranny fluid is low. I had just checked it at the beginning of the season and topped it off at that time. So where is it going? No leaks.....no fluid in the bottom of the boat. With my Tige (velvet drive) I never had a loss of fluid. My boat is a 2000 Sunsetter LXI with a ZF Hurth tranny. Any ideas ?

[brad72]

Could there be a pin prick hole in the transmision fluid cooler? I have no idea what pressure the fluid is passed through the cooler at but might be source

[Lance B. Johnson]

Was it checked on the trailer vs on the water? Seems to make a big difference on my boat.