Product Description
SOUTH BEND 1944-6OKHD ORGANIC SINGLE DISC CLUTCH KIT – 1999–2003 FORD 7.3L POWER STROKE (ZF-6)
Built for heavy towing and daily drivability. The South Bend 1944-6OKHD is a Stage 3, heavy-duty organic single-disc system for ZF-6 6-speed trucks. It delivers smooth engagement and dependable holding power around 425 HP / 900 ft-lbs when the rest of the drivetrain is in good condition. This kit includes a solid (single-mass) flywheel and will not work with the OEM dual-mass flywheel.
- Rating: ~425 HP / ~900 ft-lbs (vehicle dependent)
- Use case: Street, daily driving, heavy towing
- Friction: Full-face HD organic
- Flywheel: Solid mass conversion included
- Pressure Plate: HD clamp load with smooth, predictable engagement
- Stage: 3 (HD-Organic)
FITMENT
- Make/Engine: Ford 7.3L Power Stroke
- Model Years: 1999–2003 (some listings note 1999–2003.5)
- Transmissions: ZF-6 6-speed manual
- Flywheel Note: Includes solid flywheel; will not work with OEM dual-mass flywheel.
WHAT'S INCLUDED
- HD pressure plate
- Full-face organic clutch disc
- Solid (single-mass) flywheel
- Pilot/throwout bearing, alignment tool, hardware (as supplied by South Bend)
CROSS-REFERENCE / ALTERNATIVES
- 1944-6OR – Stage 1 Organic (~400 HP / 800 TQ)
- 1944-6OR-HD – Stage 3 HD-Organic (~425 HP / 900 TQ)
- 1944-6OFER or 1944-6OFEK – OFE upgrade (~475 HP / 1000 TQ)
- SFDD3250-6 – Street Dual Disc (up to ~650 HP / 1300 TQ) for higher-power/towing builds
INSTALL NOTES
- Confirm transmission (ZF-6) and model year before ordering.
- Follow South Bend break-in for best life and engagement.
- Inspect hydraulics; high-clamp setups benefit from healthy/HD hydraulics.
FAQ
Does this kit include a flywheel?Yes. It’s a solid (single-mass) flywheel conversion and will not work with the OEM dual-mass flywheel.
What power level is this clutch designed for?
Approximately 425 HP and 900 ft-lbs, suitable for tuned 7.3L trucks used for daily driving and heavy towing.
Is pedal feel acceptable for daily driving?
Yes. The HD organic facing and pressure plate provide firm but predictable engagement suitable for street and tow duty.
What if I tow very heavy or plan more power?
Consider stepping up to an OFE (1944-6OFER/6OFEK) or a Street Dual Disc (SFDD3250-6) for added capacity.
Will it fit trucks after mid-2003?
Coverage typically lists 1999–2003 or 1999–2003.5. Verify build date and ZF-6 application details before purchase.
Product Videos
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Product Reviews
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Pedal Pressure
I couldn't find any reviews on this clutch saying if the peddle would be easier to push than the OEM clutch. My 1999 f450 7.3 powerstroke OEM dual mass flywheel & clutch had a really stiff pedal which gave your leg a workout when driving in town. This 1944-6OK-HD makes the peddle a little easier to push than OEM but not by much. I've had dual disk clutches that made the peddle as easy as butter to push but they were so grabby & jumpy that backing up was awful, especially with a trailer. This 1944-6OK-HD engages really smooth in both forward & reverse but it takes 500 miles to break in so I can't say what it will be like by then. This 1944-6OK-HD has made the clutch pedal a tad easier to push than the oem was but don't expect a huge difference.
