I wouldnt say there are NO GEARS in a cvt, there is a few, but the connection between the input and output shaft is by a steel belt.
As for a conventional automatic you can lock up the tc while its shifting, but the harmonics and stresses are a great way to break the input shaft.
I knew of guys at one time who use to rig up switches to lock the tc for performance. Sometimes you got away with it, other times it wore out the lock up clutch and with bigger engines it broke the engine.
Quote:
Originally Posted by vlad
CVT is a variator. It doesn't have gears at all. You only need to engage it when start moving. It can variate any gear ratio in it's range this is like TC + auto transmission. TC is smoothing auto gear operation.
If you lock TC right away and start shifting auto transmission will operate very rough, overloading engine and transmission itself.
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