75k miles just installed small stall vette servo and trans go hd. goes through all gears fine when in 2nd if you go 50% throttle or more something is slipping clutches or converter don't know. I scanned a few trans channels I have never really had a need to watch transmission on scanner so don't really know what it should be normal. if someone would look at my file and see if anything jumps outs I would greatly appreciate it. only thing easy I can do is change out servo I am no trans expert but I am leaning toward clutches