95 camaro 4l60e will not shift at WOT
 

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.

Please correct me if I am wrong here but the trans on these are electronically controlled and shift points are set by the PCM I was playing around with mine past week and tried performance tune which I am not happy with making it ottle I think the tables go throttle percentage and mph not RPM. I am just spit balling here hoping someone that knows what the heck they are talking about jumps in :) I am new to the software and ended up using a old school hypertech tuner to move program while I still learn the software.

I had the car tuned and this happened then i took it back and it happened again. So its been back to the trans guy twice and and the tuner twice and still screwed up.

Mine was doing this my last track outing, I had some broken stuff in the trans along with metal.

typical 4L60E. did you have the typical sunshell (I think thats what it's called) failure?

Yup, though it was supposed to have been upgraded already :|

I had the same problem with mine at the track. I bought and installed a performabuilt level one 4l60E good for 500 RWHP and never looked back.