Four Seasons 36955 Engine Cooling Fan Clutch

Reliable Engine Cooling Fan Clutch for GM Trucks and SUVs

The Four Seasons Fan Clutch 36955 is engineered to provide dependable cooling performance for a range of GM vehicles including Chevrolet, GMC, Cadillac, and Buick models. Designed for severe duty applications, this aluminum fan clutch helps maintain optimal engine temperature under demanding conditions.

• Constructed from durable aluminum for long-lasting use
• Severe duty design suitable for trucks and heavy-duty vehicles
• Flange mounting type with 4 bolt holes (M10 x 1.5 thread)
• Non-electronic, mechanical fan clutch with 6.45 inch maximum diameter
• Compatible with multiple GM models including Silverado, Suburban, Tahoe, and more

Four Seasons Fan Clutch Product Line Overview

The Four Seasons Fan Clutch line focuses on providing reliable engine cooling components designed to meet or exceed OEM specifications. This product line emphasizes severe duty and truck fan drive applications, ensuring consistent performance in heavy-use environments. The 36955 model is part of this line, offering a flange-mounted, non-electronic clutch solution tailored for GM trucks and SUVs.

Detailed Product Description and Specifications

The Four Seasons Fan Clutch 36955 features a raw aluminum finish and is built for severe use cases, making it ideal for vehicles operating under high stress or heavy load conditions. It has a 4-bolt flange mounting system with M10 x 1.5 threaded holes, ensuring secure attachment. The clutch has a maximum diameter of 6.45 inches (163.8 mm) and an overall height of 3.66 inches (92.9 mm). The distance from the clutch to the mounting flange is 1.63 inches, and the pilot diameter and depth are both 0.63 inches. This mechanical, non-electronic clutch rotates in reverse direction and is designed to meet or exceed OEM standards for reliable engine cooling.

Compatible Vehicles and Common Applications

• Chevrolet Silverado, Suburban 1500, Tahoe
• GMC Sierra C1500, C2500, K1500, K2500, Yukon
• Cadillac DeVille, Fleetwood, Brougham
• Buick Roadmaster, Safari
• Oldsmobile Bravada, Cutlass

Common Issues Addressed by This Fan Clutch

• Overheating due to fan clutch failure or slipping
• Reduced engine cooling efficiency in severe duty conditions
• Excessive fan noise caused by worn or malfunctioning clutch
• Engine temperature fluctuations during heavy towing or hauling
• Premature wear of cooling system components due to improper fan engagement

Installation Notes and Tips

Installation requires removal of the old fan clutch and proper alignment of the 4-bolt flange mounting holes. Use M10 x 1.5 bolts (not included) to secure the clutch. Ensure the clutch rotates in the correct reverse direction as specified. Verify all mounting surfaces are clean and free of debris before installation. It is recommended to inspect the fan blades and radiator for damage during replacement.

Quality Assurance and Warranty Information

This Four Seasons Fan Clutch 36955 is a new, performance-rated part that meets or exceeds OEM specifications for severe duty applications. While mounting hardware is not included, the clutch is manufactured to strict quality standards to ensure reliable operation. Please consult the manufacturer or distributor for specific warranty details.