OE Quality
60-Day Returns

Four Seasons 46021 Engine Cooling Fan Clutch
Reliable Engine Cooling for Dodge Ram Trucks
The Four Seasons Fan Clutch 46021 is engineered to provide dependable engine cooling for Dodge Ram 1500, Ram 2500, and Ram 3500 models. Designed for severe duty applications, this aluminum fan clutch ensures consistent performance under demanding conditions.
- Constructed from durable aluminum material
- Severe duty clutch type suitable for truck fan drives
- Non-electronic, mechanical operation for reliable cooling
- Four bolt holes and mounting holes for secure installation
- Compatible with Dodge Ram 1500, 2500, and 3500 models
- Meets or exceeds OEM specifications
- Raw aluminum color with hex mounting type
- Maximum clutch diameter of 6.45 inches
- Overall height of 4.63 inches for proper fitment
About the Four Seasons Fan Clutch Product Line
The Four Seasons Fan Clutch line focuses on engine cooling components designed to maintain optimal engine temperatures in severe duty environments. This product line includes fan clutches engineered for heavy-duty truck applications, such as the Dodge Ram series, ensuring durability and performance that meet or exceed original equipment manufacturer standards.
Detailed Product Description
The Four Seasons Fan Clutch 46021 is a new, non-electronic engine cooling fan clutch constructed from aluminum, providing strength and heat resistance. It features a severe duty clutch type (D) designed specifically for truck fan drives, making it suitable for the rigorous demands of Dodge Ram 1500, 2500, and 3500 trucks. The clutch has a maximum diameter of 6.45 inches and an overall height of 4.63 inches, with a 4-bolt mounting pattern using 5/16-18 threaded holes. The hex mounting type and raw aluminum finish contribute to its robust design. This fan clutch operates with a reverse rotation and includes a pilot depth of 0.7 inches, ensuring precise fitment and reliable operation. It is performance rated and meets or exceeds OEM requirements, providing a dependable cooling solution for your engine.
Common Issues Addressed by This Fan Clutch
- Overheating due to faulty or worn fan clutch
- Reduced engine cooling efficiency in severe duty conditions
- Excessive fan noise caused by slipping or failing clutch
- Engine temperature fluctuations during heavy load or towing
- Premature wear of cooling system components
Installation Notes and Tips
Installation requires removal of the existing fan clutch and proper alignment of the 4-bolt mounting pattern. Note that mounting hardware is not included and must be sourced separately. Ensure the clutch is installed with the correct rotation direction (reverse) and torque bolts to manufacturer specifications. Verify clearance and fitment on Dodge Ram 1500, 2500, or 3500 models before finalizing installation.
Quality Assurance and Warranty
This Four Seasons Fan Clutch 46021 is a new, performance-rated part that meets or exceeds OEM standards for durability and function. Manufactured with high-quality aluminum and designed for severe duty use, it provides reliable engine cooling for Dodge Ram trucks. Warranty information is available from the manufacturer and should be confirmed at the time of purchase.
| Brand | Four Seasons |
| Part Number | 46021 |
| Position | Fan Clutch |
| Bolt Hole Quantity | 4 |
| Bolt Thread | 5/16-18 Hole |
| Clutch Maximum Diameter | 6.45 |
| Clutch Type | D - Severe Duty & Truck Fan Drive |
| Color | Raw Aluminum in Color |
| Description | Fan Clutches |
| Dia. IN | 6.45 |
| Distance From Clutch To Mounting Flange | 2.59 |
| Distance From Clutch To Mounting Flange | 2.6 |
| Electronic Clutch? | Non Electronic |
| Fan Bolt Circle IN | 3.25 |
| Fan Bolt Circle MM | 82.6 |
| Material | Aluminum |
| Meets / Exceeds OEM? | Yes |
| Mount Dia. IN | 1.44 |
| Mount Dia. MM | 36 |
| Mounting Hardware? | Not Included |
| Mounting Hole Quantity | 4 |
| Mounting Type | HEX |
| New or Reman | New |
| Overall Dia. MM | 163.8 |
| Overall Height IN | 4.63 |
| Overall Height MM | 117.3 |
| Performance Rated? | Yes |
| Pilot Depth IN | 0.7 |
| Pilot Depth MM | 17.8 |
| Pilot Dia. IN | 1.18 |
| Pilot Dia. MM | 30 |
| Rotation | REV |
| Style | Severe Duty |
| Type | Thermal |
| Use Type | Severe |
This part fits 22 vehicles. Search below:
| Year | Make | Model | Transmission | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2008 | Dodge | Ram 1500 | Automatic | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/ Heavy Duty Cooling; Fan Clutch |
| 2008 | Dodge | Ram 1500 | Manual | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/ Heavy Duty Cooling; Fan Clutch |
| 2008 | Dodge | Ram 2500 | Manual | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Snow Plow Package; Fan Clutch |
| 2008 | Dodge | Ram 3500 | Manual | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Snow Plow Package; Fan Clutch |
| 2007 | Dodge | Ram 1500 | Automatic | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/ Heavy Duty Cooling; Fan Clutch |
| 2007 | Dodge | Ram 1500 | Manual | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/ Heavy Duty Cooling; Fan Clutch |
| 2007 | Dodge | Ram 2500 | Manual | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Snow Plow Package; Fan Clutch |
| 2007 | Dodge | Ram 3500 | Manual | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Snow Plow Package; Fan Clutch |
| 2006 | Dodge | Ram 1500 | Automatic | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/ Heavy Duty Cooling; Fan Clutch |
| 2006 | Dodge | Ram 1500 | Manual | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/ Heavy Duty Cooling; Fan Clutch |
| 2006 | Dodge | Ram 2500 | Manual | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Snow Plow Package; Fan Clutch |
| 2006 | Dodge | Ram 3500 | Manual | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Snow Plow Package; Fan Clutch |
| 2005 | Dodge | Ram 1500 | Automatic | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/ Heavy Duty Cooling; Fan Clutch |
| 2005 | Dodge | Ram 1500 | Manual | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/ Heavy Duty Cooling; Fan Clutch |
| 2005 | Dodge | Ram 2500 | Manual | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Snow Plow Package; Fan Clutch |
| 2005 | Dodge | Ram 3500 | Manual | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Snow Plow Package; Fan Clutch |
| 2004 | Dodge | Ram 1500 | Automatic | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Heavy Duty Cooling; Fan Clutch |
| 2004 | Dodge | Ram 2500 | Automatic | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Heavy Duty Cooling; Fan Clutch |
| 2004 | Dodge | Ram 3500 | Automatic | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Heavy Duty Cooling; Fan Clutch |
| 2003 | Dodge | Ram 1500 | Automatic | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Heavy Duty Cooling; Fan Clutch |
| 2003 | Dodge | Ram 2500 | Automatic | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Heavy Duty Cooling; Fan Clutch |
| 2003 | Dodge | Ram 3500 | Automatic | 5.7L | V8 | N/A | Reverse Rotation; Severe Duty Thermal Fan Clutch; w/o Heavy Duty Cooling; Fan Clutch |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.