I'm having a tough time figuring out if I have an Eaton Hydro or not :wallbanging:..looking at the service manual I was pretty sure I have an Eaton which requires SAE 20. However when I check the oil level I clearly have Automatic Transmission fluid in the hydro now..which makes me think its a sundstrand. Eaton requires oil Sundstrand requires ATF. It's possible that the pervious owner made a mistake..if so should the hydro still work ok? Is there an easy way to know for sure which hydro I have? Also when the manual says "SAE 20" is that any 20 weight oil as in 5w-20 ? Thanks!