SOUTH BEND NV4500 DUAL DISC CLUTCH KIT – HEAVY TOW 850HP – 1994–2004 DODGE RAM 5.9L CUMMINS

Purpose-built for real towing. This South Bend Heavy Tow dual disc package is engineered for the 5.9L Cummins with the NV4500 5-speed. It delivers serious holding power—rated up to ~850 HP and ~1,400 lb-ft—while maintaining smooth, streetable engagement for daily driving, towing, and long-haul reliability.

• Capacity: Up to ~850 HP / ~1,400 lb-ft (truck dependent)
• Use case: Heavy Tow, work + daily driving, occasional competition
• Discs: Dual disc assembly with performance pressure plate and floater
• Includes: Upgraded 1.375" (1-3/8") input shaft kit for NV4500 durability

FITMENT

• Truck: 1994–2004 Dodge Ram 2500/3500 with 5.9L Cummins
• Transmission: NV4500 5-speed (direct fit with included 1.375" input shaft upgrade)
• Notes: Some early NV5600 Non-HO applications cross over to similar South Bend heavy-tow kits; confirm transmission and input size before ordering.

WHAT'S INCLUDED

• Performance pressure plate
• Dual clutch discs with floater plate
• Flywheel (application-specific)
• Upgraded 1.375" (1-3/8") NV4500 input shaft kit
• Pilot bearing, release bearing, alignment tool, and hardware

CROSS-REFERENCE / ALTERNATIVES

• Need smoother street/tow manners (650 HP)? SDD3250-5 Street/Tow Dual Disc
• Street/Tow with included input shaft (650 HP): SDD3250-5K
• NV5600 HO trucks (2000.5–2005.5): SDD3250-6-ORG
• Browse all NV4500 clutch kits

RECOMMENDED PARTS

• South Bend HYD-HD Hydraulics (1994–1997)
• South Bend HYDX1.50 Hydraulics (1998–2002)
• South Bend HYDX.750 Hydraulics (2003+)
• USA Standard 1.375" NV4500 Input Shaft Kit (alternative)
• CPP Extreme Duty 1.375" NV4500 Input Shaft (alternative)

INSTALL NOTES

• Confirm transmission (NV4500) and input size. This kit includes a 1.375" input shaft upgrade; truck originally equipped with 1.25" will be converted.
• Follow break-in procedure for maximum life and smooth engagement.
• Inspect or upgrade clutch hydraulics—especially on higher clamp-load systems.

FAQ

Yes. It’s designed for heavy towing with smooth engagement. As with any high-torque clutch, gear selection and EGT management are key for longevity when towing at 20–30k+ GCW.

Yes. The Heavy Tow package includes the upgraded input shaft for added strength under high load.

No—this specific kit targets NV4500. Some early Non-HO NV5600 trucks use different kits; see our NV5600 options or contact us with your VIN and trans tag.

Heavier than stock but still streetable. Expect a firmer pedal and more decisive bite suitable for heavy towing.

Yes—follow South Bend’s recommended break-in mileage and driving style for best life and engagement quality.