Lubegard 31904 Universal Limited Slip Supplement, 4 oz. Eliminates differential chatter and other noises (squeals, groans, etc.) Universally works in all makes and models with limited slip differentials including Ford, Chrysler and GM; For use in all final drives and limited slip posi-traction units (Not for use in Automatic Transmissions) Inhibits rust and corrosion and also safe for yellow metal Extends clutch pack and equipment life Reduces differential temperatures