ATP, Inc. was founded on July 1, 1955 and provides top quality products and outstanding service to its valued customers. From its humble 2,000 square foot facility in Chicago, the company strove to provide aftermarket replacement parts for automatic transmissions. Now Located in Elk Grove, Ill., a suburb of Chicago, ATP has a 92,000 sq. ft. facility that allows for quick order turn and a fill rate consistently over 98 percent.. Automotive Part Type: Automatic Transmission Detent Cable. Returnable: 90-Day. Automotive Part Type: Automatic Transmission Detent Cable