SOUTH BEND SDD3250-5K STREET/TOW DUAL DISC CLUTCH – 94–04 DODGE RAM 5.9L CUMMINS (NV4500 & NON-HO NV5600)

Built for real towing and daily drivability. The South Bend SDD3250-5K is a multi-friction Street/Tow dual disc system rated for ~650 HP and ~1,300 ft-lbs with proven 30K+ GCW towing capability when the truck is in good mechanical condition. This “5K” kit includes the 1-3/8″ upgraded input shaft to replace the stock 1-1/4″ shaft (NV4500), addressing a common twist/break failure point while keeping a light, diaphragm-style pedal and smooth engagement.

• Capacity: ~650 HP / ~1,300 ft-lbs (truck/mods dependent)
• Use case: Street, daily, and heavy towing (up to ~30,000 lbs GCW)
• Friction: Multi-friction (organic/ceramic) dual discs with ductile flywheel
• Pedal feel: Light, diaphragm pressure plate with predictable engagement

FITMENT

• Engine: 5.9L Cummins
• Model Years: 1994–2004 Ram 2500/3500 (chassis-cab variants may differ)
• Transmissions: NV4500 5-speed and NV5600 Non-HO 6-speed
• Input Shaft: Kit includes 1-3/8″ input shaft upgrade (NV4500 applications). NV5600 Non-HO fitment uses factory input; confirm spline before ordering. Not for NV5600 HO (2000.5–2005.5)—see Alternatives.

WHAT'S INCLUDED

• Performance diaphragm pressure plate
• Two multi-friction clutch discs with floater plate
• Ductile flywheel
• 1-3/8″ input shaft upgrade kit (NV4500)
• Pilot bearing, release bearing, alignment tool, install hardware

CROSS-REFERENCE / ALTERNATIVES

• SDD3250-5 (Street/Tow dual disc without input shaft kit; 1-1/4″ input)
• SDD3250-6 (for NV5600 HO 2000.5–2005.5)
• South Bend HD Hydraulics (recommended maintenance item for consistent release)

INSTALL NOTES

• Verify transmission and input spline size prior to purchase.
• Follow clutch break-in per South Bend for best life and engagement.
• Inspect/refresh hydraulics and clutch fork components during install.

FAQ

Yes. The SDD3250-5K bundles the Street/Tow dual disc with a 1-3/8″ input shaft upgrade for NV4500 applications, addressing the stock 1-1/4″ shaft’s weakness under higher torque and heavy towing.

It’s commonly run on heavy tow rigs and is advertised around 30K+ GCW when the rest of the drivetrain is healthy and you use proper driving technique (gear selection, EGT control). Always keep torque loading reasonable.

No. For HO NV5600 trucks use SDD3250-6. The “5K” kit here targets NV4500 and early Non-HO NV5600 fitments.

Lighter than many performance clutches due to the diaphragm pressure plate, with a strong bite once engaged—daily-driveable for most owners.

No. This is a Street/Tow system. For competition, consider an SFI-rated package.