Whats the real deal about sealed auto transmissions that does not need a fluid change. My soon to be wife has a 1997 VW jetta with a sealed auto transmission with 65K miles on it. I would like to change out the fluid but VW wants a chit load of money to do it. Is it possible to get many miles on an auto transmission thats driven pretty hard at least to my standards eventhough you see people getting 200-300K out of transmissions that are taken care of eventhough they are driven pretty hard?