If you've scrolled through truck forums or chatted with DIYers at a trailer park, you've probably heard someone say they "upgraded" their truck's towing capacity. Is that possible? Well, not quite.

In the off-road SUV world, the Toyota 4Runner is an icon. It's been around for decades, spanning six generations as a rough-and-tumble SUV — credentials we confirmed at the all-new 4Runner's big ...