South Bend Clutch (SBC) delivers proven holding power and drivability for Cummins-powered Rams—whether you tow daily, street/strip on weekends, or run heavy work duty. Shop complete clutch kits for NV4500, NV5600, and G56, along with heavy-duty hydraulics, flywheels, and input shafts.
Which South Bend clutch is best for towing?
For heavy tow on G56 trucks, the SDD3250-GK Street/Tow dual disc is a top choice thanks to smooth engagement and high torque capacity.
Do I need upgraded hydraulics with a dual disc?
Yes—dual discs and higher clamp loads benefit from SBC hydraulics like HYDX.750 or HYDX1.50 for proper release and pedal feel.
What’s the difference between OFE and full organic?
OFE (Organic/Feramic) increases heat capacity and holding power without the harsh on/off feel of full ceramic—great for tuned daily/tow builds. See 1947-OFEK.
Will the ISK1.25 input shaft work on my NV4500?
Yes—if you have the 1-1/4" 10-spline NV4500 spec. Confirm before ordering: ISK1.25.
Do I need a new flywheel with my NV5600 clutch?
Many kits include a flywheel; otherwise pair with SBC’s NV5600 HO flywheel: 1670104-6.