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Torque converter lock feature


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I saw in the jap subbie page that current legacy EATs have a torque converter lock (that would be a clutch that locks que torque converter).

 

I guess this means that depending on how you rev the engine while up- or downshifting with the sportshift you could get better acceleration, sort of the syncing you manually do in a MT when changing gears with the clutch and gas pedals.

 

Am I correct? Any tech insight on this?

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Locking torque converters have been around for quite some time, 10 - 15 years or so. IIRC, it means that the converter locks such that there is no slippage when cruising at a constant speed. This is why AT's are rated at similar MPG these days. Used to be a diff of a few MPG between AT/MT versions of the same car.
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My 1990 Grand Am had a locking torque converter. It was also bad, and would lock up if you drove over 50 or so, then fail to unlock when you came to a stop, stalling the car and keeping you from restarting it for 5-15 minutes. Which made for some "exciting" driving.
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