Ok, i went down there and talked to him. I told him I did some checking as to the separate trans cooler and showed him the diagram showing as much. He apologized for jumping the gun at the end of the day yesterday by telling me he thought it was the radiator leaking in to the trans by assuming it cooled via radiator. He seemed a bit embarrassed and his apology seemed genuine to me. But i saw the fluid, there is water in it. Also, my saying "trans pak" was wrong, its the transmission solenoid pak. Now if he wanted to lie to me and pour a little water in the pan to trick me? Why bother, just say the solenoid pak was shot. So its still a mystery as to how water got in there. Was it in a flood? Not while we've owned it.
Also, i forgot to ask about the bulletin he mentioned.
So these transmissions can be problematic because you had a valve body replaced on a different transmission, machines can be problematic in general.
Not to dilute the OP topic, but I would say yes, that indeed these transmissions can be problematic given my experience and what I have read regarding 5L40-E. A valve body going bad at 40K isn't good and shows that there may be inferior engineering processes that were followed in the design. At 40K there is no maintenance that would be required so the lack thereof cannot be blamed either.
There are a number of things that you can point to on the SRX and say it's problematic and back it up with posts that have been made on this forum. You will be hard pressed to do that with the 5L40e, let alone the 6L50 the OP has. BMW had problems with the 5L40e because they made a mistake and put it behind an engine that produced more torque than the transmission was designed to handle.
The best guess, after scrutinizing the bottom of the car, it was involved in a flood and it was never disclosed to us. So, while we got a "good deal" when we bought it, we paid in the long run. We live in WI so surface rust is nothing out of the ordinary, but now i see only the lower pulleys have rust on them.
Nearly 4500 dollars for repairs! that plus a down payment and your trade in and you could have a new car! I hope you get 50,000 or more miles. I do not even want to think it would cost in Europe! Well at least you have a guarantee, read the fine print since its a limited warranty!
The good news is that AAMCO stands behind their warranties from what I have heard. The bad news is you would have saved a bundle at the Cadillac dealer. Automatic transmission assembly (remanufactured) is $2340 MSRP. Of course, you would probably have to add the customary diagnostic charge, transmission fluid and a couple of hours labor to R&R. The only other option would have been an independent shop but unless you know of a really good one, that could very well have turned out to be the worst choice.