Product Description
SOUTH BEND 13125-FEK SINGLE DISC CLUTCH – 1988–2004 DODGE RAM 5.9L CUMMINS (GETRAG/NV4500 & NON-HO NV5600)
Proven 13" single disc that works. The South Bend 13125-FEK Dyna Max kit converts the factory 12-1/4" setup to a 13" feramic-lined clutch with a modified pressure plate for higher plate load and smooth engagement. It’s a durable street upgrade for tuned 5.9L Cummins trucks that still see work.
- Capacity: ~550 HP / ~1,100 ft-lbs (truck/tune dependent)
- Lining: Full feramic on marcelled fin for bite with drivability
- Conversion: 12-1/4" to 13" clutch with included flywheel
- Use case: Street/Work; not intended as a competition clutch
FITMENT
- Engine: 5.9L Cummins (12V & early 24V as noted)
- Years/Trans:
- 1988–1993 Getrag 5-speed (13" conversion; reuse OE crank bolts per application notes)
- 1994–2004 NV4500 5-speed
- 1999–2000.5 NV5600 Non-HO (235 HP)
- Not for: 2000.5–2005.5 NV5600 HO (use NV5600 HO-specific kit)
WHAT'S INCLUDED
- Modified pressure plate (higher plate load)
- 13" feramic single disc
- Flywheel (13" conversion)
- Pilot bearing, release bearing, alignment tool, hardware
CROSS-REFERENCE / ALTERNATIVES
- Repair/Replacement disc kit: 13125-FER (service kit for 13125-FEK)
- Need more holding power with street/tow manners? Consider South Bend SDD3250-5 (dual disc, ~650 HP) for NV4500/Non-HO NV5600 applications.
- For NV5600 HO (2000.5–2005.5), use an HO-specific clutch such as SDD3250-6.
INSTALL NOTES
- Confirm transmission and HO vs. Non-HO status on NV5600 trucks.
- Follow South Bend break-in procedure for best life and engagement.
- On some 1988–1993 Getrag applications, OE crank bolts may be reused; verify during install.
FAQ
What power and torque will the 13125-FEK hold?It is commonly rated around 550 HP and ~1,100 ft-lbs when used as intended. Actual results depend on tune, weight, gearing, tires, and driver behavior.
Does this kit include a flywheel?
Yes. This is a 13" conversion kit supplied with the matching flywheel for proper stack height and engagement.
Will it fit my NV5600 HO (2000.5–2005.5)?
No. The 13125-FEK is for NV4500 and Non-HO NV5600 (1999–2000.5). HO transmissions require a different kit (e.g., SDD3250-6).
Is towing recommended?
It’s a strong street/work upgrade with feramic lining. Extremely heavy towing or aggressive launches may shorten life; for frequent heavy tow, consider a dual disc.
Do I need to upgrade hydraulics?
Not strictly required, but healthy/HD hydraulics help ensure full release—especially on older trucks or higher clamp loads.
