Quote Originally Posted by 02GTPJeff View Post
If the shifts are real hard something could be hitting, headers?

How do you like the shift kit firmness? Did your pcm tune also increase the shift firmness? I was thinking about installing a shift kit with my next tranny service.
I didn't get to drive the car much before the tune because the supercharger needed rebuilding when I got the car, so I did all the the modifications at once when I rebuilt the M90. The shift kit made a huge difference in the way the car feels/drives, the torque feels instantaneous and the kick down when you go to WOT feels the same way. The big ass cooler I installed also made a big difference in trans temp, before I was seeing up to 208* on the Aeroforce for trans temp, now in stop and go traffic on a hot day I might see 180*.