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Two slim open-end wrenches marked 36mm and 40mm with half-inch drive holes

Powerbuilt

Powerbuilt Fan Clutch Wrench Set 36mm 40mm 940395

SKU CH-98CA-1T5YW

Slim-profile 36 mm and 40 mm wrenches with 1/2" drive openings remove thermostatic fan clutches on Ford, Dodge, GM and Jeep truck engines

  • Slim profile reaches tight fan assemblies where standard wrenches cannot fit
  • Built-in 1/2" square drive accepts breaker bars for extra leverage on stuck clutches
  • Heat-treated carbon steel resists bending under high torque loads
  • Covers Ford, Dodge, GM and Jeep truck engines from 2.8L to 8.0L
  • Includes both 36mm and 40mm sizes for common thermostatic fan nuts

Fan Clutch Wrench Set for Domestic Trucks

This set includes 36mm and 40mm wrenches designed to remove thermostatic fan assemblies on Ford, Dodge, GM and Jeep truck engines. The slim profile reaches tight spaces where conventional combination wrenches cannot fit, making the job easier and faster for professional mechanics and serious DIYers. Each wrench is forged from heat-treated carbon steel to resist bending and warping under high torque loads.

Slim Design with 1/2-Inch Drive for Leverage

A built-in 1/2-inch square drive opening accepts breaker bars or ratchets, giving extra leverage without needing a separate adapter. The narrow heads slide between crowded engine accessories, reducing the force needed to break stubborn nuts free. Heat-treated construction ensures the tools withstand repeated high-torque use without deforming.

Covers Common V6 V8 and V10 Truck Engines

Applications span Ford 2.8L 2.9L 3.0L 4.0L 4.9L and 5.0L, Dodge 3.9L 5.2L 5.9L and 8.0L V10, GM 4.3L 5.0L and 5.7L, plus Jeep 5.2L engines. The two sizes handle the most common fan clutch nuts across these platforms, so one set covers multiple jobs. Builders working on newer engines with different nut sizes or electric fan assemblies will need additional tooling.

Highlights

  • Slim profile reaches tight fan assemblies where standard wrenches cannot fit
  • Built-in 1/2" square drive accepts breaker bars for extra leverage on stuck clutches
  • Heat-treated carbon steel resists bending under high torque loads
  • Covers Ford, Dodge, GM and Jeep truck engines from 2.8L to 8.0L
  • Includes both 36mm and 40mm sizes for common thermostatic fan nuts

Specifications

BrandPowerbuillt

Questions about this item

How do I fit the 36 mm wrench onto the fan clutch nut without stripping it?

Slide the slim 36 mm open end squarely onto the nut flats, then insert a 1/2" breaker bar into the square drive for controlled leverage.

Will the heat-treated carbon steel jaws need replacement after repeated high-torque use?

The heat-treated carbon steel resists bending and warping, so the jaws do not require scheduled replacement under normal shop use.

At what point does the 1/2" square drive become the limiting factor during sustained torque?

The 1/2" square drive is the first component to reach its torque limit under sustained high-load applications.

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