Niiiice, low miles FTW. Well it varies depending on how abused it has been, and the maint. schedule. I would say you could get over 160K+ on it if you keep up with it and don't beat on it everywhere you drive.

That and letting it shuffle between 3rd and OD around 45-47mph will cause the 4th clutch hub to strip and loose OD. I usually keep mine in 3 unless I know I will be above 45 for a while and then I shift it into D while cruising.