L-628 Power Gear E.P. Gear Lubricant GL-4 w/moly gear oil is a multi-service EP gear lubricant manufactured with high quality base stocks and superior additive technology. They are recommended for use in gear boxes, manual transmissions, bearings, gear reducers and many other applications where API service classification GL-4 gear lubricant is specified. This product can also be used for make-up of limited slip/positive traction rear axels.