Red Line MTL 75W90 GL-4 gear oil offers quicker shifts, perfect synchronizer coefficient of friction and safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage. High performance gear protection and longer synchro life, eliminates notchy shifting, even when cold and satisifies the gear oil viscosity requirements of 75W, 80W and motor oil viscosities of SAE 40, 10W40, and 15W40.

Recommended for GL-1, GL-3, and GL-4 applications, as well as where most special synchromesh fluids are specified