Document p3K420xrwRgyydNrEraGE74X

are approximate. Names marked with an asterisk were used. if at all, for an unknown period of time before 1969. (d) See response to (c). (e) The grade of chrysotile asbestos in drum brake linings GM purchased is unknown. The specific formulations used in the manufacture of brake linings are valuable proprietary information that are disclosed only within GM on a need-to-know basis. These formulations are the result of decades of investment of time and money and their disclosure would put GM at a serious competitive disadvantage because domestic and foreign competitors could duplicate GM's products without having to undertake the lengthy and expensive laboratory and vehicle testing programs undertaken by GM. Competitors could also use this information to improve their products and processing methods without having to compensate GM for its efforts. For these reasons, GM objects to the disclosure of the details of its formulations. (f) GM continues to manufacture drum brake linings containing chrysotile. (g) Not applicable. (h) Drum brake lining segments consist of e solid, curved, dense, grayish material. Typical arc lengths range from 90 to 130 degrees and are for drum diameters of 7, 8, 9)4, 11, 12, and 12K inches. (i) Drum brake linings are one component of a vehicle braking system. {]) Not applicable. As to disc brake linings: (a) GM began the manufacture and sale of disc brake linings in 1966. (b) See response to (a). Outside suppliers of drum and disc brake linings were Johns-Manviile, Abex Corporation, Eaton Brake Division, Dana Axle, American Coleman, Delco Moraine, Inland/inlite, B.F. Goodrich, Bendix, Dayton Watther, H.K. Porter, Kelsey Hayes, Kelsey Products Division, Rockwell International, Unibond Brake, Wagner Electric, Raybestos Manhattan, Friction Division Products, Ferodo, ITT AMCO, Multibestos, Universal Friction, Akebono, AMCO and Marshall Eclipse. JMMICABHOOMMl/artS 8