I just got a 2008 G8 GT after wanting one since they came out. It is red, one owner with 67,500 original miles. Has CAI and axle back exhaust mods. I did the 91 octane tune but am stumped on the tranny. Mostly with the TM feature and adjusting the pressures and rpms for shifts. I have turned off the DOD and don't plan to use it. I have a 4yr/48k miles warranty so I don't plan to do a bunch of mods to it right now. Right now the trans shifts like the clutches are burned out because it slips so much, especially with throttle input(and I have a heavy foot when needed). I tried the Firm shift program with 10% at all intermediate throttle and 20 at all WOT. I left TM on. It felt almost the same as stock. I tried Hard shift and it will bark second gear but it still feels like it is slipping some before it hits hard. Is that the TM function causing that? Can I turn it off and then go back to Firm and make mods? What is the best route? I don't want to feel like it is breaking my neck with regular driving but I don't want it slipping for 2 seconds either. Any help would be appreciated. Thanks.