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Description
1999–2003 7.3L Powerstroke Maintenance & Filters
Sure, we all love modifying our trucks, but when it comes down to brass tacks, the most important thing you can do for your 7.3 Powerstroke is to properly maintain it. If you make sure to always use high-quality oil and filters, you'll have hundreds of thousands of trouble-free miles. And for those times when service is required, we also offer numerous tools and diagnostic equipment to make the job that much easier and more enjoyable.
Factory Fluid Capacities & Recommended Weights
Engine Oil (7.3L Powerstroke)
- Capacity: 15 quarts (with filter change)
- Recommended Oil: 15W-40 diesel engine oil or 5W-40 for cold climates
Automatic Transmission (4R100)
- Capacity: 17–18 quarts (dry fill)
- Service Fill: varies depending on the drain method
- Recommended Fluid: MERCON V ATF
Manual Transmission ( ZF S6-650)
- Capacity: Slightly below 6 quarts
- Recommended Fluid: MERCON V ATF
Transfer Case: NV271 (manual shift) or mNV273 (electric shift)
- Capacity: ~2 quarts
- Recommended Fluid: MERCON ATF
Front Differential: (Dana 50 or 60)
- Capacity: 3 Quarts
- Recommended Fluid: 75W-90 synthetic gear oil
Rear Differential (Sterling 10.5")
- Capacity: 3.48 quarts
- Recommended Fluid: 75W-140 synthetic gear oil
Use high-quality filtration and OEM-spec fluids to maintain optimal oil pressure, cooling efficiency, and drivetrain protection. Explore trusted maintenance parts and filters designed specifically for the 1999–2003 7.3L Powerstroke to keep your truck running strong for the long haul.