Harmon Performance Blog
Work Truck in Construction Traffic: How Stop-and-Go Driving Affects Your Diesel Drivetrain
A work truck can spend a whole day creeping through construction traffic, idling at a job site, hauling tools, and pulling a trailer, and still barely add enough miles to make the odometer look busy. That does not mean it had an easy day. That's the tricky part about...
Planning a Road Trip? Transmission Warning Signs to Check Before You Go
Planning a long road trip means checking your tires, oil, and maybe your wiper blades. Your transmission usually doesn't make that list, until it acts up somewhere between home and your destination. That's the tricky part about transmission trouble. It often shows up...
Transmission Temperature: What Is Normal, What Is Not, and Why It Matters
Heat is one of the biggest threats to your transmission. Most drivers never think about transmission temperature until something goes wrong, but by then the damage is already building up inside. Understanding what normal looks like, what causes temperature to spike,...