perryjosh64
Member
Folks sorry for broken record question but not found answer yet. Have a 1964 Ford 2000 gas tractor w/4 spd trans. It's basically a Ford 601 tractor with different color scheme and hood. Looking to change trans and rear end fluids that are currently 303 hydraulic oil. Original fluid was mild Extreme Pressure SAE 80W. I've found a few 90W GL1 gear oil products but seems there are a lot of 80W90 GL5 oils but Im not smart on the GL classifications and have read concerns about yellow metal protection. Dont even know if mine has yellow metal in trans/rear so thats why asking.