On my way to Chicago to catch a flight to Spain a couple weeks ago....Cruising along at 75mph with the cruise control and I hear a slight drilling type noise... I replay the song I was listening to to see if it was that. Nope. All the sudden “clunk”, van slows a bit and the cruise control tries to maintain speed... “CLUNK”, serious vibration and I pull to a stop on the interstate.... thinking I’ve just dropped a driveshaft I get out and examine the underbelly. Nope, driveshaft intact. So, I put the van in gear and try to move it, there’s a spinning grinding noise and zero movement. Thinking now the trans has gone BOOM! I call a tow truck and get it towed to a the tow place, hop in the tow truck drivers car and get a 90 mile ride to the airport to catch my flight. After 2 weeks in Spain and lots of planning, my friend loads the van up and I get a ride to meet him. He listens to what the issue may be and we’ve decided it may not be the transmission but the flywheel or torque converter... it’s going in the shop soon but wanted to get your thoughts.