Product Description
SOUTH BEND SDD3250-6 STREET/TOW DUAL DISC CLUTCH – 00.5–05.5 DODGE RAM 5.9L CUMMINS (NV5600 HO, 1-3/8" INPUT)
Tow hard. Drive smooth. The South Bend SDD3250-6 is a half-organic/half-ceramic Street/Tow dual disc engineered for the NV5600 HO 6-speed with the 1-3/8" (1.375") input shaft. It delivers light pedal effort, quiet operation, and serious holding capacity for tuned 5.9L Cummins workhorses that still daily drive and tow.
- Capacity: ~650 HP / ~1,300 ft-lbs (truck/mods dependent)
- Use case: Street/Tow, heavy towing, daily driving
- Pedal feel: Light, diaphragm-style pressure plate
- Discs: Dual, mixed friction (organic facing flywheel/pressure plate; ceramic on opposing sides) for smooth takeoff + bite under load
- Flywheel: Ductile iron, included
- Not SFI certified (street/tow use)
FITMENT
- Engine: 5.9L Cummins
- Model Years: 2000.5–2005.5 Dodge Ram 2500/3500 HO
- Transmission: NV5600 HO 6-speed only
- Input Shaft: 1-3/8" (1.375") required
- Does not fit: 1999–2000 Non-HO NV5600 (small 1.25" input) or NV4500—use SDD3250-5 instead.
WHAT'S INCLUDED
- Performance diaphragm pressure plate
- Two multi-friction clutch discs with floater plate
- Ductile flywheel
- Pilot bearing, release bearing, alignment tool, hardware
RECOMMENDED / CROSS-REFERENCE
- Alternative for NV4500 & early Non-HO NV5600 (1.25" input): SDD3250-5
- South Bend HD Hydraulics — recommended for consistent release, especially on higher-clamp systems
- 1-3/8" input shaft upgrades (if you’re converting platforms in the future)
INSTALL NOTES
- Confirm NV5600 HO and 1-3/8" input before ordering.
- Follow South Bend break-in for best life and engagement.
- Inspect/refresh hydraulics; performance clutches benefit from strong hydraulics.
FAQ
Will this clutch fit my 1999–2000 NV5600 truck?No. Early Non-HO NV5600 uses the smaller 1.25" input and different spec. Choose the SDD3250-5.
What’s the real-world tow capability?
It’s commonly used for 20–30k+ GCW towing when the truck and tune are set up properly. Always manage RPM/EGTs and use the proper gear under load.
How’s the pedal feel and drivability?
Lighter pedal than many performance clutches with smooth take-off (organic sides toward flywheel/pressure plate) and strong bite when clamped.
Is this SFI certified or competition rated?
No—this is a Street/Tow system aimed at daily/towing use. For competition, consider an SFI-rated package.
