I have/had the same problem on my '06 4.0 V6. The pump lever was so 'heavy' it felt like I was lifting a 10 pound weight. It started max flow before I could regulate it. And then shut itself off in less than a second.
I switched gas stations/mini-marts and found a station with 'soft' handles, I could get the gas flowing and gradually speed it up. Solved the problem for me.
As to cause, as others have stated in related posts, I formerly rounded the fill up to the nearest dollar. That happened when the pump shut off, and I squeezed a few cents more in. That clogged the system. Now, I pre-pay for a specific dollar amount and hang up the hose at the first pump shut-off.