Tranny didn't act up in dad's truck until 180K, that was after pulling both lanscaping trailers/travel trailer before he bought it, then dad's beating on it with loads gravel/ firewood/ contruction supplies. Too bad GM has never gotten a handle on rust issues of the bodies in their trucks, dad's truck is destined for part out and the scrapper.
I know the 2000 GMC 1500 we had at work, rusted so bad the bed sides actually fell off and the corner of the cab was completely gone.
My 2004 Ram had rust so bad around the rear fender wells that my fender flares fell off.
My 2003 Ranger the bottom of the tail gate rusted off.
Rust issues are still pretty common even in vehicles made in the last 10 years. I don't know that we will ever see a rust free vehicle.