Product Description
SOUTH BEND 1944-6OR-HD HD-ORGANIC SINGLE DISC CLUTCH – 1999–2003.5 FORD 7.3L POWER STROKE (ZF-6)
Proven HD-organic street/tow performance. The South Bend 1944-6OR-HD is a single disc repair clutch kit engineered for the 7.3L Power Stroke with the ZF-6 manual. It delivers smooth engagement, strong holding power up to 425 HP / 900 ft-lbs, and daily-driveable pedal feel.
- Rating: ~425 HP / ~900 ft-lbs (vehicle dependent)
- Friction: HD-Organic (single disc)
- Pressure Plate: Diaphragm style
- Flywheel: Not included – repair kit for South Bend flywheel only; will not work with OEM flywheel
- Intended Use: Street, daily, towing
FITMENT
- Engine: 7.3L Power Stroke Diesel
- Model Years: 1999–2003.5 Ford F-250 / F-350 (select chassis variations possible)
- Transmission: ZF S6-650 (ZF-6) 6-speed manual
- Input: 10-spline, ~1.375" input shaft (ZF-6 standard)
WHAT’S INCLUDED
- HD-Organic clutch disc (single)
- Performance diaphragm pressure plate
- Release (throwout) bearing & pilot bushing
- Alignment tool and hardware (as supplied by South Bend)
CROSS-REFERENCE / ALTERNATIVES
Looking for different use cases or components? Consider these options on CPP Diesel:
- Dual-disc upgrade for higher power 7.3L builds
- South Bend ZF-6 hydraulic upgrade kit
- South Bend ZF-6 flywheel (required if converting from an OEM flywheel)
INSTALL NOTES
- Flywheel compatibility: This is a repair kit for South Bend flywheels; it will not bolt to an OEM flywheel.
- Inspect flywheel surface and hydraulics; replace worn components to ensure proper release and longevity.
- Follow South Bend break-in procedures for best life and engagement quality.
FAQ
Will this work with my stock (OEM) flywheel?No. The 1944-6OR-HD is a repair kit designed to be used with a South Bend flywheel. It will not work with the OEM flywheel.
How does pedal feel compare to stock?
The diaphragm pressure plate keeps pedal effort manageable and engagement smooth for daily use and towing.
What transmission does this fit?
The ZF S6-650 (ZF-6) 6-speed manual used behind the 7.3L Power Stroke in 1999–2003.5 Super Duty trucks.
Is this enough for mild tuning and towing?
Yes—up to ~425 HP / ~900 ft-lbs when the drivetrain is healthy and used appropriately. For higher power or aggressive use, consider a dual-disc upgrade.
