ATF is on the thinner side of what i would run. ATF is not very nice to most types of rubber, or plastic it is also very good at finding it’s way out of containment. I would run something a little thicker if u can but if ATF is all you have it will keep your chain lubed enough to prevent any significant wear in your chain case. In my opinion you can use just about anything wet with at least the viscosity of cooking oil in most chain cases with the exception of high horsepower machines such as race sleds, real mountain sleds, chain case oil in a 550f has a pretty easy job.

as long as it oils the chain and gears. if its to runny, it is no good.@@dabraapshack8754

Not sure I'll just quit being cheap and buy the right stuff