This 80W-90 Mystik JT-7 Multi-Purpose Gear Lubricant is a multi-purpose, thermally stable, sulfur-phosphorus extreme pressure (EP) gear lubricant that exceeds the performance requirements of the latest axle and non-synchronized manual transmission. A specially balanced additive provides a thermally stable gear lubricant with exceptional durability under high temperature conditions. Not all thermally stable gear lubricants are thermally durable – many lose their EP performance when subjected to thermal stress.