Whether you're hauling a heavy trailer through the mountains or crawling over rocks in 4WD low, your truck’s transmission is under constant stress—and that stress generates heat. Lots of it. Left unchecked, heat is one of the fastest ways to wear down a transmission. That’s where a transmission cooler steps in. So, what does a transmission cooler actually do, and why might it be time to consider replacing or upgrading one?
An automatic transmission operates by using hydraulic fluid to transfer power, control gear changes, and lubricate internal components. Every time your truck shifts, tows, climbs, or even just idles in traffic, that fluid
