Hello all, I'm new here and need some trans help. I have a 2003 gtp that has the 3.4 pulley,cold air intake and computer mods have been done. The trans blew and I had it rebuilt along with a shift kit and a 500 rpm over stock convertor. My problem is when the tcs is off and the trans is in drive from a dead stop when it goes to wot it revs up to 4500 to 5000 and slowly pulls! But if I pull it into low manually it blows the tires off and runs great! Is this a computer issue? I hope. Thanks.