I want a manual because replacing the clutch is something I can do in the driveway in an afternoon whereas rebuilding an auto is at least 4x more money and the truck down several days. A clutch is a wear item wherever one exists and inside an auto trans there are several clutches any of which begin failing the rest go with along with the valve body and sometimes the pump. Yeah the 8 speeds shift quicker but they shift more often. Every shift there's some slippage, cannot be avoided. Slippage is wear. It'll be interesting to see how the shift-happy 8 speeds hold up over time. They've proven they can hold the power and not slip initially, let's see how they do once those cvi numbers start creeping up.