Dave W Posted February 2, 2009 Share Posted February 2, 2009 I can't see it needing any additional power to lock up, on the ZF it's achieved by reversing the flow of oil through the TC, the oil would flow the same regardless of lock up, "all" that changes is the direction of flow. The real saving comes through increased efficiency in passing power through the torque converter when it is locked up. Quote Link to comment Share on other sites More sharing options...
Bill Shurvinton Posted February 2, 2009 Share Posted February 2, 2009 I'll see if I can find my notes on TC efficiency, I think you will find that at cruise, where input and output shaft are close to the same speed that they are in fact very efficient. NOTE: none of this takes into account that a lead footed loon might mess things up by giving it large when a gentle application of throttle would do the same! Quote Link to comment Share on other sites More sharing options...
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