[95BlackZ28vert]

I have a 95 Camaro with a 4l60e and i am having a problem at the track at wide open throttle. It leaves great but does not want to shift unless i back off the throttle. Once I let out of the gas it will shift. I have a 383 lt1 putting down just under 400 to the wheels with a strange rear 4:11 gear 3600 stall trans specialties converter. Ive tried to shift manual and just leave it in drive no difference still no shift. The trans has just been rebuilt with a shift kit and new valve body. Im not a trans guy and this is driving me nuts! Any help would be appreciated. And by the way the trans feels ok just normal driving.