SUMMARY: <b>DETROIT</b> - GM Powertrain unveils an all-new family of Hydra-Matic rear-wheel-drive (RWD) six-speed automatic transmissions designed to deliver new levels of performance and efficiency for GM products throughout the world. The new six-speed automatic transmission family is comprised of four distinct variants developed and built to advance Hydra-Matic's 65-year tradition of building world-class automatic transmissions. <br><b>Part 4 of 5</b>
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