Lucas Automatic Transmission Fluid Conditioner is formulated with the highest quality synthetic base oils and additives to help prevent minor leaks and promote smoother shifting. Our unique chemistry prolongs fluid life, improves fluid shear stability and improves fluid oxidation to minimize sludge and varnish formation. It reduces parts wear and extends equipment life; it also reduces noise and shudder. Lucas ATF Conditioner contains an effective foam inhibitor and conditions seals to minimize or stop small leaks. It maintains cold temperature properties and improves shifting performance. Designed for use in both new and older vehicles. Compatible with commercial and synthetic ATF fluids. Do not use in Ford Type F and CVT.