<VV> hypoid gear oil

[henry kaczmarek]

Michael

I am tossing in my .02, though I am not totally sure I am correct, I am certain I will be corrected if wrong on this. 

Though I presently am involved in the production of Tapered Roller Bearings, I haven't ever made gears.  I think I remember reading once that there is a difference in the manufacture of gears that makes a difference in the type of gear lubricant you use.  If I read this correctly, the shape of the cut of the gear teeth makes a difference.

Even if I am dead wrong, and may be, all the things that John Roberts says about MARINE lower gear units rings so solid, I would stay the hell away from the marine gear lube. There are Hypoid marine lower unit gear lubes out there, but I would ditto those, for the same reason John delineated. 

When I went looking for Synthetic Gear Lube for the diff on the EUM, I found GL-5 for automotive  Hypoid gearboxes made by Amsoil.  Ken Hand (Handy Car Care), a former V V guy and full time Corvair Repair guy, is an Amsoil dealer. So are several other  V V members, who should be able to assist .  Amsoil has a website where you can read all about it. 

Of course, you might decide to go with "ULTRA" series Differential fluid, available from your local purveyor of "ULTRA" Parts.  You can be assured that ULTRA series diff fluid has been carefully drained from dozens of used manual transaxle units, even less carefully strained through often used cheesecloth to remove bits of gear and synchro, and may also be certified that some of it may have originally been added at the Saginaw gear plant in Buffalo, NY during the original production run---so you know you're getting the right stuff <GGG>.  Your ULTRA parts supplier should have a product bulletin available with all the particulars.

Regards
HANK