hi I have 2010 S4 with 75k miles and my dealer just told me I need new transmission and it will cost me 14k. I want to get your feedback on what I should do? Fix it or rebuild it from a transmission experts or sell it to a dealer? I had the mechatronics replaced two years ago by the same dealer and I never felt that they fixed it properly. Now they want the entire transmission to be replaced. Please advise