WOW! That is ridiculously expensive. I see your point now. The automakers have been working hard for years to fine tune the "bending over a barrel" process......it seems that with the current newer generations it is starting to be accomplished. I'll stick with slightly older stuff with a 6 speed. I'm stuck with an 8 speed too, but thankfully it has been quite robust.I do, that absolutely is clear.
I've asked them to send me the error codes they said they were seeing, as well as any graph outputs that would aid me in making a decision.
I also got a second opinion, and to change those two components, the cost was almost equal between the dealer and this other shop, which is apparently highly reputable. $5k is the amount.
FWIW, a new transmission is $13k, from the dealer. The transmission shop I spoke to that gave me the second opinion, stated that it's difficult if not impossible for THEM to do a rebuild because they just don't have the experience with it.
Best of luck buddy.