My trans was rebuilt a year ago and has 6500 miles on it, it has a hardened sprag, new clutches and a shift kit. Also has a 3,000 stall. When I go WOT mostly going about 20mph and from a stop when it get to roughly 80-90 when it's suppose to shift into 3rd it feels like it revs out but it makes no power and it doesn't keep pulling hard like it should when I punch it from say 60mph. It just hangs at about 5000-5500 and it just stays there and feels like its barley pulling and the engine acts a little funny like it's just floating (sorta live valve float). Could my pump be going out or my clutches be bad? Btw: my engine makes 440hp/450tq. Any input would be helpful!