TC1601 is the update i had done recently. It's fixed my other three problems I had with the transmission but it gave it a new problem. It does not like to use six gear if cruise control is on the second you take off drop in the overdrive just like it is supposed to be. I had a major blowout at the dealership and ended up recording the whole conversation I'm waiting for Toyota to get back to me before I send them the audio from my conversation. I will try and post my conversation so everyone can laugh at how scandalous the car dealers are as soon as I figure out how to do it.
Think hard about posting an audio recording. In some states even making a recording can get you in a jackpot with the criminal code. Also, the dealer or the subjects of the recording could make a civil issue out of it. Also, most disputes about cars require some type of arbitration. An arbitrator might take a dim view of you posting a recording in a public forum even if it is legal.
I'm not lawyer and I have no legal training. But, I do know that what feels good now might be seen as spiteful by a third party and that will not help you later.