We installed a large oil filter in the return line from the bellhousing to the tank. That was my first mistake. In cold weather this filter would bung up...freeze maybe and then pressurize the bellhousing and contaminate the starter as it is a wet clutch. Yes lots of fun. Have eliminated the filter and testing to see what happens now that we are in cold weather. We have changed complete hydraulic oil 5 plus times and still oil is milky white. Any suggestions as to where it is coming from and how to eliminate/combat this issue??? This is driving me to drink more....my second mistake.