Replacing the radiator & transmission on Nissan Pathfinder solves the problem?

What is your question?

I just bought a 2005 Nissan Pathfinder from a dealership who agreed to replace the radiator after I had done some research on the issue. While waiting for the parts to come I have been driving it around and I can hear what sounds like rumble strips and then a hard downshift. Now I'm afraid that the transmission is already ruined, which is thankfully covered under warranty. My question is once the transmission and radiator is replaced, does this solve the problem? Or are my fellow pathfinder owners still having issues with this after they've been replaced? I only see complaints on websites and not anything about what happens after the problem is "fixed."