He has a 2000 Z28 with headers and intake that he says doesn't shift under WOT, whether from a roll or dig. He said under normal driving it is perfectly fine, but if he romps on it, it will just rev until he lets out.
ERIK|1998 Chevrolet Camaro SS #2008 "Claire" PaceSetter LT's|ORY|BorlaMouth into CME w/ 6LE "Double D" Tips|LS6 Intake|Ported TB|SLP CAI|MSD Wires|Yella Terra Roller Rockers|SLP STB|UMI Adj. LCA's|UMI Adj. PHB|Strano Springs|Koni 4/3's|Frame Ties|Tuned
Typically, something has changed, such as a higher stall converter, the MPH to RPM ratio is no longer the same and the tune is now hitting redline before hitting the shift MPH. Typically a tune to reduce the WOT shift MPH by 5% or so will solve the problem.
post #2 and 3 are most likely. The question is....did it just start this on its own with no work or changes to the car? If so, tranny time...if u been changing gears, tune, stall, etc. u will have to go in the tune and change WOT shift parameters as indicated.