so my corolla 2011 is automatic
 

I Only did this a few times, but I need to know if it would destroy my transmission.
While I'm driving and the shifter is in d . at maybe 2k or 3k reps I shift it down to 2 to get higher revs and faster acceleration Is it bad on the car.
I need a nonopinionated answer Thanks.

I think you are going to wear out your torque converter and it is expensive to fix. your little corolla is not really design to drive that way, please don't drive that hard.

My thoughts are no, though it's probably intended for towing / engine braking, not for more acceleration.

The torque converter is not going to wear, given he isn't using the torque converter lock at that low of a speed.

Your going to damage the clutches / bands inside the transmission if you do that frequently.

sure i could be wrong, not really knowing automatic transmission well

whats wrong with just putting your foot to the floor?

Might not feel slower, but dropping gear like that probably is :P

This. If you just hit the pedal with some oomph, the transmission is programmed to downshift to give you more power, and then it'll shift back up once it hits the 'appropriate' speed.

There is something called "kickdown", it is activated when you step on the accelerator pedal all the way to the very bottom (some cars have a notchy feel at the very bottom of the stroke to tell you that's to activate it). Kickdown enables the auto tranny to goto the lowest possible gear for maximum acceleration.

When driving the car, always keep the shifter in "D". Some cars have multiple D selections to allow you to select a lower gear for normal driving (i.e. D3, D4 like on the old Hondas). I remember old Toyotas have an O/D (overdrive) button which does the same thing. Gear selector "2" is for engine braking when going downhill, while "1" (if yours have it) is for towing.

I don't think your Corolla slushbox knows how to blip the throttle on downshifts, so yes it's bad for the tranny with what you are doing.

If you read the user's manual, this should be all clearly explained to you (but I just saved you 5 mins of flipping thru it). :thumbsup:

Thanks guys really appreciate it. I haven't done it too often so I won't anymore. I'm going to put some wheels on it 18" and then use those on the brz when I get it. 5 by 100

so my corolla 2011 is automatic
 

I've done that in my automatic car before (Toyota Landcruiser Prado) felt like it was engine braking and slowing down rather than just trying for higher revs for acceleration.
Just my personal experience

This is no different than the trans performing its own "kickdown" as mentioned above.

Now granted modern trans usually have a computer in it somewhere that is capable of making some decisions so letting the trans perform it's own kickdown is probably safer than forcing it.

This. You're not doing anything bad to the transmission at all.

To come back to old Toyota ATs:
My 91 Supra is AT with 3 "gears" and overdrive as 4th.
Any problems leaving OD on all the time? Manual suggests turning OD off only if you notice it shifting up, down, up, down... Like on uphill.