Riffraff Diesel Technical Knowledge Center

Top 10 4R100 Problems 7.3 Owners Should Fix Before Towing Season

Top 10 4R100 Problems 7.3 Owners Should Fix Before Towing Season

Posted by Adam Blattenberg on Jun 17th 2026

The 7.3L Powerstroke will usually drag the trailer wherever you point it. The 4R100 however, needs a little more respect. It is not a bad transmission by any means, but heat, old fluid, weak cooler ca … read more
S&B OBS 7.3 Powerstroke Cold Air Intake Kit 94–97

S&B OBS 7.3 Powerstroke Cold Air Intake Kit 94–97

Jun 17th 2026

The factory 1994–1997 OBS 7.3 Powerstroke intake gets the job done, but it is not exactly known for airflow. The S&B OBS 7.3 Powerstroke Cold Air Intake Kit gives the truck a cleaner, less r … read more