ZF Getriebe GmbH has managed to produce a six-speed automatic handling up to 553 lb.-ft. (750 Nm) input torque that is 13% lighter and 2 ins. (5 cm) shorter than the company's 5-speed unit it is expected to replace. The cuts in weight and bulk are achieved by an unusual gear arrangement giving six forward ratios with only five shift elements. It uses the so-called Lepelletier concept, having a simple planetary gearset in the front of the transmission that delivers both full and 60% engine ...
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