Cub Cadet 72 differential fluid question
 

Hi everyone, first post here. I know this question comes up from time to time, and I've read as much as I can find on the topic of rear diff fluid, but I'm still unclear on what to use. I have a 1968 Cub 72, non-hydro. I only use it for mowing. I need to change the fluid and filter, but what exactly should I buy? I don't have access to Hy-Tran. I've seen people say SAE 30, 80W90, and even ATF are all acceptable in the differential.

Correct answer is either Hy-tran OR SAE 30 engine oil

Thank you!