94 Z28
 

Why when im racing i have to let go of the gas if not it will redline like in all gears or some times even on the passing gear why is that does it need a oil and filter change or what "AUTOMATIC"

Mine did that at the track so I stopped runnin.. Not to long after the trans went....

so its braking or what

good possibility, change fluid and filter it may help (I doubt it though)

yea once it starts to slipp up like that unless its a PC error sor something like 1 in a million bazillion chance your cookin clutchpacks.