Did the transmission last year in my 01, didn't cost very much (for a transmission) but I got all the updates done, a shift kit, upgraded valve body, pan magnet, drain plug install and synthetic oil all for under $2400. I did the removal and install in the driveway, that saved me an extra 1000.
I did the math and it still made more sense to rebuild the transmission than it did to get a new truck, it was 2400 vs 50,000 as momma wanted a new loaded Explorer if we were going to upgrade.
Glad I made the rebuild choice, the transmission shifts like an old school C6 now, sharp, crisp shifts.... nothing like the slush box that it came with the truck.
This spring I will be adding a spin on filter to the cooler line, that with regular 30,000 KM oil changes and band adjustments, this transmission will last forever.