PONTIAC, MI – General Motors Corp. says math-based tools allowed it to shave $150 million from the development of its current 6-speed transmission lineup, a launch that began in 2004 and now numbers nine gearboxes. “Two to three (transmissions) in a decade would be a big deal,” says Jim Lanzon, executive director-transmission engineering at GM Powertrain. “But to do 10 in four years or so takes a lot of tools, a lot of know-how and disciplined execution.” The 10th 6-speed arrives next ...

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