05 4.8is Transmission GA6HP26Z Snap-On Code 4F8A

[Clutch]

This thread has been untouched for awhile - unfortunately I am having the exact same problem at 59K miles on my 2006 4.8is. Dealer says replace the whole thing; will not rebuild. My indie says the same thing; will not rebuild. Dealer first quoted $9200 repair or $5000 for a trade-in. Both ridiculous. He came down a bit to $5700 with a 2-year warranty. Why is their premier, high performance tranny failing at <60K miles? I am second owner and drive it pretty mildly. I don't know what the first owner did with their 23K miles. Can't even try to unload it somewhere because you never know if this slip will show up on the test drive or not. Like these fellas, I'm in a jam. Dump it and lose a fortune, or spend a fortune and wait for the next thing to break? This 4.8 is a great car when it's working, but seems like it's always broken. Even if I fix the tranny, I have an air suspension stuck in transport mode (and perplexing the dealer) and the infuriating front PDC failure that ain't cheap unless I do it. How can I praise the car and whine about it at the same time? I wonder that myself. I must be insane. Not sure what I'm going to do. I still have a couple of days before I need to make a decision.