I disagree, that trans is their 727 that has been in use since the 60s and 70s. I rebuilt mine @200K (miles)and it could have gone more. I have read posts about 300K transmissions. Its when we add more power with engine mods is the problem, and when service has been neglected.
Floyd
I have also read posts about people having stock hp and have the transmission go out at 30k. A buddy had his go out at under 20k. He no drives Chevy.
Auto manufacturers have ALWAYS built the transmission with at least a little cushen, so modification didn't grenade them. You never had to worry about the old TH-400s, C-6s, and even the TF727, which is the platform for the 47re. They were built to handle way more horsepower then the engines made. Sure, if you really hot rodded the engine, you had to address it. If you added 100 or even 200 horsepower, it was fine. That is the problem I have with the MOPAR 47re. If you don't believe me, try reading this site or others. The stock 47 re, at stock horsepower would: slip on a regular basis, shift at he wrong time, hunt for gears, and had poor lock-up. Ford and Chevy owners arn't wiring up mystery switches, piecing together potentiometers (since the tps doesnt work well), and adding expensive lockup controllers. The 47re probably would have been ok for a gas powered 1500 (not V-10). Dodge/Chrysler was famous for having bad transmissions for many years. People still make comments about not purchasing dodge due to their transmissions, even though it appears they have corrected the problems.
So, if your suggesting to go with Mopar rebuild, you are also suggesting to keep the truck stock. The reason the "performance" transmission builders are successful is because they addressed the problems with the Mopar design. They mill the drums for additional clutches, re-work the valve body, boost line pressure, add billet parts, and many other tricks. I do believe a properly built 47re is a very strong and reliable transmission. With so many improvements being made over the last 20 years and so many quality companies out there, why recommend going backwards with stock parts? He has an opportunity to own a very good transmission, steer him in that direction.