1978-83 Chevorlet TH35 Transmission Cooler Lines OE Steel 2pc Manufactured By Inline Tube in the Usa These preformed transmission lines replace the original transmission cooler lines and run from transmission to radiator following the factory routing. Our replacement lines are engineered from factory original lines and Cnc manufactured for precision. They include the correct fittings, flares, and protective wrap (where equipped) and are designed to work with factory radiators and components. Vacuum modulator lines are also available for most vehicles and can be found in the related products below or by choosing the appropriate category in the main navigation above.