I voted 100-124K. I had one go 101K and die. I got it rebuilt, then had something (haven't messed with it yet) drop the fluid at 138K. I'm on my second Ex, which was driven only once or twice a month for 10 years, but needed tranny work at 56K. So I replaced it with a brand new Ford A4LD-HD. We'll see what it does. Can't say I've had great luck with them so far.