This isn’t what we’d call your typical Toyota axle swap, but it works. That’s a full-width, full-floating, 12 1/4-inch Eaton axle that spins 4.57 gears. The axle came out of a ’68 GMC 3/4-ton and has had the spider gears welded up solid for better traction. Like the rest of the truck, the suspension was designed to ride low and flex big. Toyota rear leaves ride on cantilever shackles and are controlled by four Rancho shocks that angle inboard toward the center of the truck to fit under the flatbed.