Hey everyone I've been lurking for a bit but I finally got myself a new to me BCS 735 with a 26in tiller that's in pretty good shape and I was just wander what type of gear oil I should put in the transmission and tillers gearbox. I have a bunch of America 75-90 extreme pressure at home. Would that be an except able to out in it. Also can I run the gl4 and gl5 grades in this? I know I shouldn't in my old horse tiller because of the bronze. Also how do I tell what years it is? I was told it was bought from earth tools about 5 years ago. I was thinking of calling him tomorrow. Thanks for the help!