Scary steering shaft/coupler failure!

While you can certainly replace the factory coupler with a u joint, the factory coupler when in good condition or rebuilt is a good design and works very well. Stop and think about how many millions of Chrysler products came with them and how long they lasted. If it was a bad design, there would either have been a massive recall or lots of dead people, neither of which happened. No sense in insulting each other over a personal decision of which type coupler to use. Just use the one you like and be happy.