The TCU will not let you "drop down" to a "gear ratio" that isn't consider within safe operating parameters for the CVT. Though, with these Jatcos it's not the TCU I worry about but the reliability or longevity of the transmission itself.
I agree, too, with mtgtnt - due to a lack of some form of "Sport" mode on this vehicle, the only way to quickly make the transmission recognize that you need a tighter simulated "gear" is to paddle-down, then go back to D so it can adjust to the proper gear ratio.
The best acceleration with a CVT actually happens in "D" or "D-M". Paddle shifting other than stated above is a joke with any Jatco transmission. The latter (D-M) actually does shift up those simulated gears for you, only that each shift is done much closer to redline. So, if you find that you need to "shift" aggressively for more than just one moment, then consider setting your shifter to D-M.
Finally, on "resetting" the CVT --- talk to the dealership about that. Further, ask them if there's a "teach-in" procedure that they can perform on the transmission. That might help make your CVT a little more responsive. (Though, again, I wouldn't expect much from a Jatco transmission.)
(Teach-in is like a recalibration of sorts, where the TCU recalibrates its own math parameters based on the current "break-in" conditions of the engine, etc. For instance, Revs to 6000RPM, brake pedal depression, intake pressure, etc.)
Last edited by slippercream; 03-29-2019 at 10:15 AM.