I have a 4WD, V-6, manual transmission, extended-cab Tacoma. The GVWR is 5100lbs. With my aging pop-top camper, spouse and dog, I'm carrying close to 5500lbs which exceeds the GVWR by almost 400 lbs. Curiously though, I'm just at the max recommended payload (camper and family = 5500. Truck alone...