Pennzoil 4963-12PK Gearplus 80W-90 GL-5 Gear Lubricant - 1 Quart, (Pack of 12) SAE 80W-90 GL-5 Gear Lubricant is a fully balanced, robust formulation for optimum axles and transmission protection SAE 80W-90 GL-5 gives the full protection of SAE 90 under high temperatures and hard driving conditions, while still providing the fast flow characteristics of SAE 80W when cold SAE 80W-90 GL-5 is recommended for use in hypoid or spiral bevel gear differentials and manual transmissions where an API service GL-5 lubricant and SAE 80W, 90 or 80W-90 viscosity grade is specified Suitable for all limited slip applications Compatible with other gear oils under a wide range of operation and storage conditions