I have searched high and low for the oil type/weight for my gears. Twin Disc says that there is a lube data plate on the gear that specs the type and amount. There is not a lube plate only the CAT spec plate. It gives the gear type, Ratio, pressure and capacity but no oil specs. Original owner used 30wt CD grade oil. Since neither CAT or TD will give an answer does anyone have this gear? If so what oil do you use?