Heres a truth for you: Keeping your trucks vital fluids cool is essential. As power steering fluid, automatic transmission fluid, and engine oil heat up, they begin to break down. This breakdown leads to accelerated wear of the components these lubricants are supposed to protect, and can even meet unexpected failure of your truck on the trail. The harder you work your 4x4 the faster these fluids heat up.
Studies show that with automatic transmissions, a 20-degree reduction in fluid temperature can double the life of an automatic transmission. The same can be said of power steering pumps and boxes. A fuel cooler will prevent vapor lock in fuel-injection systems and has the added bonus of providing more energy per gallon than hot fuel does. Engine oil not only lubricates but also does a lot to cool the motor too. An engine oil cooler will help keep your engine cool.
Automatic coolers are rated in terms of gross vehicle weight (GVW) or British Thermal Units (BTUs).
We installed a Flex-A-Lite dual-circuit cooler on one of our trucks to help chill the automatic transmission and the power steering. Installation was simple. The hardest part was mounting the cooler itself behind the grille. After that, it was just some hoses and clamps to get the job done. Anyone can do it in a few hours and in so doing, gain years of life for their trucks components.