Far as I know, the V6 model has one less clutch in all the packs making it weaker than the V8 model. It is probably shifting at higher RPM's because the governor is set for a V6, which revs higher than most V8's, I think. I would put in a shift kit to help it last a little longer but it probably won't last very long. /forums/images/graemlins/frown.gif