I voted between 100 and 200,000 but...
I am at 162,000 now and the only transmission problems I had was the torque converter locking and unlocking. That was fixed with a reflash at 110,000. So far no other problems, knock on wood. With the bed I have I estimate a heavier truck than most, do not have an exact weight to compare. I have a 16 ft. bumper pull, 24 ft. stock trailer and 24 ft flatbed, both of the 24's are goosenecks. I have hauled four-wheelers, cattle, hay, metal roofing, 4-H kids luggage and wet limestone (in a borrowed 20 ft dump trailer). Most of my miles are commuting 35 miles to work and road trips to meetings and 4-H activites. I plan on upgrades but am milking the stock one for a while longer.
Todd