I have a C6 that i have gotten rebuilt and i had put about 3,000 miles on it. It shifted funny like it would only stay in 2nd gear for only a second and when it was shifting into third the rpms would jump up before shifting in gear. I just put in a new streetfighter valve body yesterday and i took it for a spin today. My fluid levels are ok but it still shifts weird like it did before. I can tell some improvement on the shift firmness but it still acts funny when it is in drive. Does anyone know what could be the problem?