I finally came up with a bottle of Margay Gearbox lube.
A superior scientifically balanced Anti Foaming Transmission Lubricant specially formulated for maximum service and protection to bearings & gear train in the Margay gearbox.
On the back it says;
This lubricant passes all GM test procedure.
Put 4-6 oz in gear box.
DO NOT fill above oil level fill plug. Check oil level occasionally and add lubricant to compensate for carry off due to changing gears.
8 fl oz bottle.
Smells like tranny fluid, looks like tranny fluid, just might be tranny fluid!
Margay Gearbox Lube
Moderator: Rob Voska