Originally Posted by Surfside77
Yes my 2012 has done the same thing as far as downshifting and revving high rps, usually when im going down hill and slow down, it like its dropping to first. I know this is not normal, must be a 2012 issue. The people at Toyota act like its thier first day on the job when you present this problem! After spending almost $34000 on the top of the lign set up, this does concern me!
It will learn your driving habits. And they do downshift. How high is it revving while braking down a hill?
Originally Posted by SoCalTacos
it happened to me once going uphill where it wouldnt up-shift...stayed in second gear until i let off the gas and stepped on it again.
If I am understanding you correctly, my 06 is similar to this. This is my first automatic and i found it odd, but what I believe to be happening is this: If you give it a good bit of gas and make it downshift it likes to stay in that lower gear for a bit. Takes mine a lot longer than I expected to decide it can shift back into the higher gear. I assume its giving you time to get back on it if needed with out causing the trans to shift up in down too much. Once it has noticed your throttle has settled out and your not trying to pass someone or whatever it is that you were doing to cause the downshift, it eventually says OK time to get those RPMs back down. This only happens when i really get on it.
I notice it the most if I am in the mountains cruising at like 55 and try to pass a semi. RPMs were at like 1800, then i jump them to 4k+(downshifting to 3rd). If i am also going up a decent grade, that will leave more load on the trans and cause even more hesitation to drop back into a higher gear. I have tried backing off the gas pedal completely and it likes to stay in that gear for a good 5 seconds longer than i expect. I personally don't think its a flaw, i think it was designed like that to keep you from hammering the trans if it were to immediately shift back into 5th once you let off out of a hard acceleration like what i described.
This is just my best guess though, nothing that I know for a fact. I would be interested to hear other peoples diagnosis too.
Its an odd sensation having it in D with hardly any gas but the RPMs staying high. Since the truck was designed to also be able to Tow a decent weight for the size truck, this could also explain it. That trans is going to have a hard day if you have 5k Lbs behind you and its shifting up the first second you left off the gas only to realize that was a momentary break in acceleration and you are again on it, causing it to downshift again.