Rockford® introduced its first on-highway Class 8 truck fan clutch over 40 years ago and has continued to apply and refine the technology for off-highway applications ever since. Today, our line of high-performance fan clutches continues to set the standard for reduction of fuel consumption and fan-generated noise, prolonged engine life, fast warm up and improved productivity.

Rockford’s unique variable speed technology enables our fan clutches to respond to changes in the engine cooling demands by varying the fan speed. This is accomplished by using a stand-alone control system or through today’s high-tech engines’ ECMs. This allows the fan to slow down or speed up as necessary, utilizing less working horsepower from the engine and lowering fuel consumption. Our patented fan clutch is offered in various sizes.

Each fan clutch series number relates to its relative size within the product family. We currently offer fan clutches for engines from 400 to 4,000 horsepower which use cooling fans from 10 to 300 horsepower.