[Jeepman]

What happens next? Have to stop? turn off engine? restart?
Limp mode protecting the transmission from damage, possibly? Sounds like limp mode.
Any banging noises? Any banging noise before the power loss?
Check out issues with the compounder? That's a common shifting problem.

Compounder:

Gears Magazine - A Compound Solution

The 62TE has been around since 2007. In this edition of Fun With Transmissions, we are going to check out the 62TE compounder unit. We’ll look at how it works and some of the things we need to pay attention to when we are rebuilding the unit. The concept was to take the 41TE (4

gearsmagazine.com

Common Stuff:

Gears Magazine - Six-Speed Success! 62TE Things To Do To Deliver Them Right The First Time

The 62TE transmission is Mopar’s answer to increasing the fuel efficiency of their front-wheel drive vehicles. While it is fundamentally a 41TE with an underdrive assembly on the countershaft, it has its own personality as well as problems. Pattern failures have emerged with these units over the...

gearsmagazine.com

Common Problems:

62TE Transmission Common Problems

62TE Transmission Issues: What You Need to Know The 62TE transmission made its debut in 2007, primarily in Chrysler vehicles such as the Ram, Pro Master and Pickup Lines, boasting enhanced internal components designed to handle increased torque demands. It also features revised gear ratios...

monstertransmission.com

Transmission Issues (62TE):

https://www.chryslerminivan.net/threads/the-unofficial-transmission-issues-thread.130554/#replies