The car is fine when I first start it up and drive around. If I floor it around 45 and make it shift into second the car will no longer shift into 3rd or 4th gear. Occasionally it will shift in 3rd but never OD. I checked the fluid and its good, not burnt. The car has a SS3200 yank and it is a built trans supposedly made to withstand over 600RWHP. I really dont notice any slipping. I tried manually moving the shifter into 3rd and 4th with no luck. 1st and 2nd gear seem unaffected. No SES lights either. Please help.

 

even though there is no code showing it sounds like limp mode make sure that the code po757 test is turned off in tuning,

 

I was looking around the site and seems it could be p0103 problem as well, especially because I am procharged. I will check the po757 as well.