Most people thought of a Dodge Ram when they hear the brand Cummins. It is not surprising at all since it has become quite popular when they first came out, and the name stuck. However, Cummins offers four categories of automotive engines, such as Pickup, Light Commercial class, Medium-Duty class and as well as the Heavy-Duty class.
Cummins has been credited in being able to save the Dodge trucks from extinction in the 1980s by supplying Chrysler with their legendary diesel engines. If you are going to look at it now by today’s standards, it is archaic, but back then, it was considered very much advanced as some even called or described it as light years ahead of its automotive rivals.
- 1 Top 5 Aftermarket Clutches For Dodge Cummins
- 2 Buyer’s Guide: Should You Replace Aftermarket Clutch For Your Dodge Ram Cummins Engines
- 3 Understanding Different Cummins Engines
- 4 Upgrading the Cummins Clutch
- 5 Key Rules in Choosing the Replacement Clutch
- 6 Final Thoughts
Top 5 Aftermarket Clutches For Dodge Cummins
1) South Bend Clutch G56-OFEK
Key Features: 13” Half Organic Half Feramic Clutch Kit, Flywheel, Hydraulics, 475 horsepower, 1000 ft-lbs torque, 25k towing capacity.
This single-disc unit clutch is for a 2005.5-2018 Dodge 5.9 and 6.7L Cummins. It will stand for any added horsepower and torque if there are aftermarket performance upgrades. However, it is still best to match the horsepower and workload to get better results. This G56 OFEK is a stage-2 clutch. It can handle the maximum power of 475 hp and 1000 lb-ft. While it is capable of towing up to 25k, it is not recommended to use for stock applications. It comes with a flywheel, throwout bearing, and other essential mounting hardware for easy installation.
It is best suited for those who want extra power as it can deliver superb towing power with great shift control and, at the same time, help you save money on fuel.
2) South Bend Clutch G56-OKHD Clutch Kit
Key Features: 13” Half Organic Half Feramic Clutch Kit, Flywheel, Hydraulics, 425 horsepower, 900 ft-lbs torque, 20k towing capacity.
It is the predecessor to the South Bend Clutch G56-OFEK. It can be used with or without the flywheel. The Kevlar organic disc comes with a full face, sprung hub style with a pressure plate style diaphragm, and the input spline quantity is 10.
3) Valair NMU70G56TRIPLE-NW – Cummins – Triple Disc Ceramic Clutch
Key features: 12” x 1.375” performance replacement, Ceramic Button Disk, 1000 horsepower, #3250 diaphragm pressure plate, flywheel, floater plates, bearing, and alignment tool.
The Valair NMU70G56TRIPLE-NW Triple Disc Ceramic Clutch is a 12-inch disc with a 1.375-inch input shaft that is best suited for street performance upgrades, which are used mainly for competitions. This is a non-stocking item that is built to order with SFI certification. It comes with steel roller bearing, floater plates, and a steel billet flywheel.
This triple clutch is highly recommended for those who need fast controls and will need it for competitions. It comes with a higher price tag as compared to the others due to its top features.
4) Valair NMU70G56DDB – Cummins – Dual Disc Clutch for G56
Key features: 13” x 1.375” disc, Ceramic Buttons, 800 horsepower, Billet Steel Flywheel, Steel insert, Pressure Plate Load, Release Bearing, Bolt Kit, and Alignment Tool.
This type of Dual Disc Clutch ceramic model is suited for 2005-2016 applications. It can provide up to 800 horsepower performance, which is best for heavy-duty towing jobs. It comes with a 13-inch disc and an input shaft diameter of 1.375 inches, a lever-type pressure plate. Furthermore, it can reach up to 10 for its input spline quantity, and other mounting components.
For those looking for a dual-disc clutch that can handle high performance towing or will be used for competitions, the Valair NMU70G56-01 is highly recommended, but you should expect to pay twice as much than usual for it.
5) South Bend Clutch SDD3250-6 Clutch Kit
Key features: Dual disc, half organic, half ceramic, 650 HP, 1300 lb-ft torque, 30k tower capacity, required hardware for easy installation.
This South Bend Clutch Kit provides high performance with 650 horsepower and 1300 lb-ft torque with a towing capacity of 30k. This is a stage 4 powerful clutch kit but not suitable for stock trucks or competitions. It can be used for Dodge Ram model years from 2000 – 2005. Expect some noise and slow shifts, but with the right amount of throttle, it can deliver the kind of power that you need.
Buyer’s Guide: Should You Replace Aftermarket Clutch For Your Dodge Ram Cummins Engines
Most auto shop mechanics and technicians would agree that there are basically three common reasons why there is a need to replace the stock clutch for your Dodge Ram Cummins engines.
The first one is because the OEM clutch is totally worn out. The next one is the additional power performance for the Dodge Ram, and the third one is the need for more towing power without the slippage problem.
The Dodge Ram incorporated the Dual Mass Flywheel (DMF) clutch from 2005 up to 2015. This was done to minimize the regular vibration on the trucks and offer a car more-like vibe to the whole stick shift system.
However, some issues came about from those trucks that were upgraded to the Dual Mass Flywheel clutch. Modifications from the original equipment used such as increasing torque capacity can wear out the clutch since it was not originally designed for the upgraded torque rating. Most RAM truck owners shared the same sentiment, and the common feedback was that after just 40K miles, the clutch just easily wore out.
There is already a solution to this issue, which is quite simple and easy to do. Cummins produced the Solid Flywheel Conversion Kit precisely to deal with this problem. Using this conversion kit will provide additional torque rating, but it has a downside. The dual flywheel has to be converted to just a single one and that will bring back the vibrations that can be felt through the transmission.
Understanding Different Cummins Engines
The most popular engines are the 6.7L Cummins and the 5.9L , but each of these two has more types of engines under it. To discuss the best clutches for these engines, let us first briefly look into the different Cummins engines.
The 12-Valve 2nd Gen Cummins was a great improvement from the 1st Gen with new injectors, better turbocharger, and larger intercooler. Cummins even up the ante by making enhancements on the 24-Valve versions while retaining the same body style. It used a rotary electric VP44 fuel injection pump along with a 235 horsepower and 460lb-ft of torque capability.
Upgrading the Cummins Clutch
“Should I upgrade my Cummins Clutch?” is a common question from owners who encountered the following scenarios:
- When the increased horsepower of your Cummins, Duramax, and Powerstroke went beyond what your current clutch can handle.
- You were having difficulty in towing heavy loads, which were beyond the weight level that your current clutch can handle.
- The current clutch of your truck has been worn out and needs replacement.
While vehicle owners share common reasons for thinking of getting an upgrade, not all of them need the same clutch upgrade. Some upgrades are not suitable for all customers. It is wise to get the appropriate clutch grade that would match or be compatible with your diesel engine truck instead of getting the most popular one.
Key Rules in Choosing the Replacement Clutch
- The estimated horsepower (HP) of your vehicle should match the HP rating of the clutch or slightly exceed it.
- Choose the SFI approved multi-disc clutch if you are going to use the vehicle for sled-pulling competitions.
- If your truck regularly tows around 15,000 pounds or more and in excess of about 450 rear-wheel horsepower, the street double disc clutch is best suited for your vehicle.
- A single disc clutch is not recommended for extreme towing or much higher horsepower.
- Do not enter competitions with the street dual disc as they are not designed for it.
- All competition multi-disc clutches should have a certification from the SFI.
- Avoid using competition clutches for towing in the street as they are not user-friendly and extremely tough to use for towing.
- A quality aftermarket clutch, assuming it will be properly driven, is expected to outlast the stock clutch by twice or thrice its normal use.
It is important to remember that things will feel differently when your vehicle has been modified above the limitations that it was designed for. A performance clutch becomes necessary because of these modifications. The appropriate clutch will help lessen the effects of these alterations.
Each clutch is designed with limitations and those with higher or even extreme horsepower are not the easiest to drive. Before making the upgrade, check the limitations of your truck as well as the driving skills to get the most suitable clutch for it.
Before doing the clutch upgrade, be reminded that no matter how high the horsepower, the rating, or how reputable the maker is, no clutch can be considered unbreakable. Use it properly and reasonably so it will last longer.
Making an upgrade to the stock clutch makes a lot of sense, but you should always know your options before making a final decision. Only consider the options that are suitable for your engine. That being said, you should upgrade and enjoy the power of your Dodge Cummins again.