The GTP's tran took a shit a couple weeks ago and taking advice from Gearhead I took the trans to Rushman Automotive over in Hilliard. And I'm very glad I did listen to him. Guys there did phenominal work rebuilding the trans and even throwing several extra goodies in there to ensure it's ready for some dragstrip action.
The price they charged me was so rediculously low that I even ofered to pay more for all the help they'd provided. Only problem I had was the side cover got cracked and they took care of that completely at their own expense and had it done the same day I dropped the car off.
Oh and I also pulled and reinstalled myself so that's part of the reason it was cheaper but still a damn good price.