Paired together to save you time and hassle, this convenient gear oil change kit features Valvoline 75W140 Synpower Gear Oil with replacement differential gasket for your 12 Bolt GM rearend. Kit Includes: (3) Valvoline VV982 Synpower 75W140 Gear Oil, Quart. (1) 12 Bolt GM Rear End Differential Cover Gasket. (1) Performance Tool W1145 Hand Fluid Transfer Pump. (1) Valco Cincinnati 710XX135 All-In-One Silicone, Black, 3 oz. Valvoline VV982 Synpower 75W140 Gear Oil Formulated for ultimate protection and performance. Thermally stable, extreme-pressure gear lubricant, designed to operate and protect in both high and low extreme-temperature conditions. Specially recommended for limited-slip hypoid differentials and compatible with conventional gear lubricants. Maintains excellent low temperature fluid protection. Provides outstanding thermal stability for cleanliness and longer service life. Contains special additives to assist in protecting gear teeth from rust and corrosion. Contains special additives to reduce chattering in limited-slip differentials. 75W-140. 12 Bolt GM Rear End Differential Cover Gasket Reusable rear differential gasket. Designed to ensure a leak-free seal. Pressed composite. Fits GM cover (part number 550-3784) Fits 12 bolt GM differentials. Performance Tool W1145 Hand Fluid Transfer Pump Transfer your gear oil to or from your differential with ease. Valco Cincinnati 710XX135 All-In-One Silicone, Black, 3 oz Seal up your new differential gasket. One premium-grade RTV silicone that does it all. Effective up to 600°F. Black in color. Low volatility. 3 oz tube with nozzle.