YPSILANTI, MI – General Motors Corp. is ramping up production of a new family of rear-drive 6-speed automatic transmissions at a plant-within-a-plant here. The new 1 million-sq.-ft. (92,900 sq.-m) Ypsilanti Transmission Operations (YTO) sits inside GM Powertrain's mammoth and historic mile-long Willow Run facility that was used to make B-24 Liberator bomber planes during World War II and still produces older-generation 4-speed automatics and parts for GM. New 6L80 handles up to 520 ...

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