My auto. 03 GT has 4.10's, a tune, and exhaust. 1st gear is useless, 1-2 shift sends my rear sliding out, and can chirp 2-3 sometimes. The rears are only 245/45/17. If I floor it from 20mph (in drive), it will spin and send the rear sliding a little bit. This is with new tires as well. Gonna...