Riffraff Diesel Technical Knowledge Center
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
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Top 10 7.3 Powerstroke Oil Leaks That Get Mistaken for a Rear Main Seal
Jun 2nd 2026
The 7.3L Powerstroke has a gift for making one leak look like another. Oil starts high, runs down the valley, follows the back of the block, coats the bellhousing, and suddenly everyone is yelling &ld
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Common 4x4 Problems on 1994–2010 Ford F-250/350 Trucks: Symptoms, Causes, and Fixes
Apr 21st 2026
If you are chasing 1994–2010 Ford F-250 4x4 problems, the good news is most of them follow a pattern. On the 1994–1997 OBS trucks, the biggest issue is usually the automatic locking hubs.
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The Ford “Switch Fire” Recall Family: 99V-124, 05S28 (05V-017), 07V-078, 07V-336, and 09V-399
Posted by Adam Blattenberg on Feb 20th 2026
If you’ve ever heard an old Ford guy say “check that cruise control switch before it checks your garage for smoke detectors,” this is what they’re talking about.
Easilly the mo
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7.3 Powerstroke Billet Thermostat Housing for 1999–2003: Fixing Corrosion and Coolant Leaks
Feb 2nd 2026
A 7.3 Powerstroke thermostat housing leak often starts small—coolant smell, dried residue near the upper hose, or a slow drip that usually only shows up after a heat cycle. On 1999–2003 7.
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