Product Description
Mopar 55056990AC Cooling Fan Clutch for 2004-2010 Dodge Ram 5.9L & 6.7L Cummins
The Mopar 55056990AC Cooling Fan Clutch is a genuine OEM replacement designed to restore proper cooling performance in 2004-2010 Dodge Ram trucks equipped with the legendary 5.9L or 6.7L Cummins diesel engine. Engineered to factory specifications, this electronically controlled fan clutch provides precise fan engagement to help maintain optimal engine temperatures during towing, hauling, daily driving, and demanding operating conditions.
When engine temperatures rise, the fan clutch engages the cooling fan to increase airflow through the radiator. During normal operating conditions, it reduces fan drag to improve efficiency and minimize unnecessary engine load. A failing fan clutch can lead to overheating, excessive fan noise, poor cooling performance, and reduced air conditioning performance. Replacing it with a genuine Mopar unit ensures proper fitment, durability, and factory-calibrated operation.
Unlike many aftermarket alternatives, the Mopar 55056990AC is designed specifically for Cummins-powered Ram trucks and is the latest supersession of earlier Mopar fan clutch part numbers.
Features
- Genuine Mopar OEM cooling fan clutch
- Direct replacement for factory-installed fan clutch
- Helps maintain proper engine operating temperatures
- Supports optimal cooling system performance
- Electronically controlled fan engagement
- Reduces unnecessary fan drag during normal operation
- Designed for towing, hauling, and heavy-duty applications
- Factory-calibrated for Cummins diesel engines
- Restores proper airflow through the radiator
- OEM fit, function, and reliability
Fitment
- 2004.5-2009 Dodge Ram 2500 5.9L Cummins
- 2004.5-2009 Dodge Ram 3500 5.9L Cummins
- 2007.5-2010 Dodge Ram 2500 6.7L Cummins
- 2007.5-2010 Dodge Ram 3500 6.7L Cummins
- 2009-2010 Dodge Ram 4500 6.7L Cummins
- 2008-2010 Dodge Ram 5500 6.7L Cummins
Note: Verify vehicle compatibility using your VIN before ordering. This fan clutch uses a right-hand thread mounting nut.
What's Included
- Mopar 55056990AC Cooling Fan Clutch Assembly
Specifications
- Manufacturer: Mopar
- Part Number: 55056990AC
- Product Type: Cooling Fan Clutch
- Engine Compatibility: 5.9L Cummins Diesel / 6.7L Cummins Diesel
- Vehicle Compatibility: 2004.5-2010 Dodge Ram Applications
- Operation Type: Electronic Fan Clutch
- Installation Type: Direct OEM Replacement
- Thread Direction: Right-Hand Thread
- Condition: New Genuine Mopar Component
- Warranty: Mopar OEM Warranty
- Replaces: 55056990AA, 55056990AB
Cross Reference Numbers
55056990AC, 55056990AB, 55056990AA, Mopar Fan Clutch, Cummins Cooling Fan Clutch, Dodge Ram Fan Drive Assembly
FAQ
What are the symptoms of a failing fan clutch?
Common symptoms include engine overheating, excessive fan noise, poor cooling performance, reduced air conditioning performance, fan clutch seizure, or failure of the cooling fan to engage properly.
Is this a genuine Mopar OEM part?
Yes. The 55056990AC is a genuine Mopar cooling fan clutch designed specifically for Cummins-powered Dodge Ram applications.
What part numbers does this fan clutch replace?
Mopar 55056990AC supersedes earlier fan clutch part numbers 55056990AA and 55056990AB.
Will this fit both 5.9L and 6.7L Cummins engines?
Yes. This fan clutch is used on select 2004.5-2010 Dodge Ram applications equipped with either the 5.9L or 6.7L Cummins diesel engine.
Why choose a genuine Mopar fan clutch?
Genuine Mopar components are engineered to factory specifications for proper thermal response, cooling performance, durability, and direct-fit installation.
Is professional installation recommended?
While installation is relatively straightforward for experienced technicians, proper tools and procedures are recommended to ensure safe removal and installation of the fan clutch assembly.
