Four Seasons 46066 Engine Cooling Fan Clutch

Four Seasons 46066 Fan Clutch Overview

The Four Seasons 46066 engine cooling fan clutch is a severe-duty thermal replacement for select Ford Super Duty applications. Built from aluminum with a reverse-rotation design, it is made for trucks that need consistent fan engagement under demanding cooling loads.

Compatible with Ford E-350 Super Duty, Ford F-250 Super Duty, and Ford F-350 Super Duty applications, this Four Seasons fan clutch is a direct-fit option for reverse rotation cooling systems. The Four Seasons Fan Clutch line focuses on OE-style cooling control for truck and van platforms that rely on thermal fan drive performance.

Key Features

• Part number: 46066
• Severe-duty thermal fan clutch for truck cooling systems
• Reverse rotation (REV) design
• Non-electronic thermal operation
• Aluminum construction with raw aluminum finish
• 4-bolt / 4 mounting hole design
• Meets or exceeds OEM requirements
• Performance rated for demanding use
• Mounting hardware not included

Detailed Product Description

This Four Seasons 46066 fan clutch uses a thermal, severe-duty truck fan drive design to regulate fan engagement based on temperature demand. It features a 7.4-inch clutch diameter, 4.94-inch overall height, 1.86-inch mount diameter, and a 3.25-inch fan bolt circle, with M6 x 1.0 hole threading and hex mounting type. The reverse-rotation configuration is important for matching the factory cooling setup on the listed Ford Super Duty vehicles. This part cross-references Dorman - HELP 46066 for the same application.

Fits 2006-2019 Ford E-350 Super Duty, N/A. Fits 1999-2010 Ford F-250 Super Duty, N/A. Fits 1999-2010 Ford F-350 Super Duty, N/A. If you are searching for a Ford F-250 Super Duty reverse rotation severe duty thermal fan clutch or a Ford E-350 Super Duty cooling fan clutch replacement, Four Seasons 46066 is built for those applications.

Common Problems This Part Can Address

• Fan clutch that no longer engages properly at operating temperature
• Cooling fan noise caused by worn thermal clutch components
• Reduced airflow at idle or low vehicle speed
• Overheating concerns in severe-duty truck service
• Incorrect fan drive operation after clutch wear or failure

Installation Notes and Tips

• Verify reverse rotation and bolt pattern before installation.
• Confirm the 4-bolt fan attachment and 1.86-inch mount diameter match the original unit.
• Inspect the fan, pulley area, and surrounding cooling components during replacement.
• Transfer or source any required mounting hardware separately, since hardware is not included.
• Use the vehicle’s factory service information for torque and installation procedures.

Quality Assurance

Four Seasons 46066 is a new, performance-rated fan clutch that meets or exceeds OEM specifications for the listed Ford Super Duty applications. It is designed as a direct replacement for severe-duty thermal cooling systems and is backed by Four Seasons product engineering standards.