The go-fast off-road crowd loves TTB suspension so much that it is occasionally swapped onto trucks and SUVs that had solid front axles from the factory. We’ve seen at least two Jeep SUVs, including this XJ (and a WJ), that have had Ford TTB swapped in. And while TTB has also been stripped out of several Ford 4x4s in favor of solid axles, people aren’t adding TTB just to be different. This type of independent suspension, like most, works well when hitting big bumps and going fast off-road. For rockcrawling, TTB can be built to withstand 35-inch tires, anything over that and you’re better off with a heavy-duty solid front axle.