Fitment: 2009-2010 Dodge Ram 1500 Pickup br/>2009-2010 Dodge Ram 2500 Pickup br/>2009 Dodge Ram 3500 Pickup br/>2009-2010 Dodge Ram 4000 br/>2011-2023 Ram 1500 br/>2019-2023 Ram 1500 Classic br/>2011-2019 Ram 2500 br/>2011-2018 Ram 3500 br/>2011-2020 Ram 4000 What is a Fan Clutch? A fan clutch is a thermostatic engine cooling fan that can freewheel at low temperatures when cooling is not needed, allowing the engine to warm up faster, relieving unnecessary load on the engine. As temperatures increase, the clutch engages so that the fan is driven by engine power and moves air to cool the engine. .
