hi have just had a trans built here with a suncoast kit billet convertor etc after we thought the c3 clutches where destroyed (ended up looking fine) as it was what feels like neautral shifting 2-3 shift and 4-5 shift once trans temp gets to 65-70 degrees celcius. Anyway after the rebuild the truck is doing the exact same thing.. any help would be great no codes at all come up and it shift so smooth and runs great up till those Temps i don't know what else to check