I warmed the truck up and drove about 2 mi. before stopping and shutting off. No problems until I started back up a few minutes later. It revved to 2000 RPM and wouldn't go faster than 30 mph. Right before I got home I got it to 40 mph. Went in reverse without problems. I tried starting again and went up and down driveway. It seemed fine. It is a 5.7L Hemi with 68000 miles. Thanks.

check tranny fluid

Fuel filter?