STARFIRE GL-5 Gear Lubricant meets the API GL-5, GL-4 Service Designations as well as the MIL-L-2105D and MIL Prf 2105E and is suitable for use in limited slip differentials. STARFIRE GL-5 Gear Lubricant is also suitable for use in Mack GO-H & GO-J and Proposed PG-1/PG-2 Service Designations, Scania STO 110, Meritor -076D (80W90), and Meritor -076A (85W140), MAN 342 M2 (160,000 km), and MB 235.80. STARFIRE GL-5 Gear Lubricant meets API MT 1. For use when extreme pressure (EP) gear oils are required: In all heavy duty truck differentials - In all domestic automobile differentials and some manually shifted transmissions - in heavy duty manually shifted truck transmissions requiring API MT 1 performance? In oil-lubricated wheel bearings