Riffraff Diesel Technical Knowledge Center
John Wood 4R100 Transmission Valve Body Upgrade: Step By Step How To
Mar 6th 2026
Recommended Tools:
8mm socket
10mm socket
Extension for 10mm socket
In‐lb torque wrench
Drain pan
Bag of oil dry or plastic sheet
Recommended Items:
Transmission fluid ( 5‐7 qts. may b
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Riffraff Diesel Stainless Steel HPx Oil Crossover Line Install Guide (1994–1997 Ford OBS 7.3L Powerstroke)
Mar 6th 2026
Parts required:
Stainless Steel HPX 94-97: https://www.riffraffdiesel.com/stainless-steel-hpx-94-97/
Stainless Steel HPX 99-03: https://www.riffraffdiesel.com/stainless-steel-hpx-99-03/
Recomme
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Riffraff Diesel Billet 7.3L Fuel Bowl Cap (1999–2003): Function and Style, keep the OEM filter
Feb 26th 2026
If you’ve owned a 1999–2003 7.3 Powerstroke long enough to do a few fuel filters, you’ve probably met the factory fuel bowl cap in its natural habitat: tired, stripped out, and one b
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Gradient Cooling for 7.3 Powerstroke: 4R100 Cooler Upgrade (1999–2003)
Feb 26th 2026
If you tow with a 1999–2003 7.3L Super Duty, you already know the weak link isn’t usually the engine—it’s usually 4R100 transmission heat issues. That’s where the Gradien
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Why You Need It: Riffraff Diesel Billet Valve Cover Set for 2003–2007 6.0L Powerstroke
Feb 17th 2026
If there’s one thing a 6.0L will do with consistency, it’s find weak sealing surfaces and turn them into an oil “misting” problem making the engine a mess. That’s exactly
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