Now have 168,000 miles on it and needed to replace a front wheel bearing recently. Still original tranny, at least since 83000 miles when I bought it. Going to sell it soon before I begin to put more money in it. Really have not had to put much in it besides the well documented problem of a leaking oil/coolant gasket. Has been the best van I have had (Chrysler, Ford are the others).
Olds seemed to have been the best of the three (Pontiac & Chevy) in looks and reliability. Wouldn't really know why because of their similariy.