So I could really use some help. I have worked in the automotive field my whole life but I'm not the slightest bit skilled in front wheel trannys. So, I'm driving my 2005 gp gtp(comp g) down the hwy at about 60 mphs. Car in front of me is driving slow. I pull out to pass, car downshifts and then acts like i threw it in neutral. No movement of wheels in drive, reverse or with paddle shifters. The car does have 300,000+ miles on it and has original trans. The trans has never acted out in the slightest bit. Not sure if any noise occured when problem first happened as I was jamming to radio, but i hear no strange noise while increasing rpms. Axle shafts seem to be okay. Im wondering if possibly a diff could cause these problems or if im looking more towards a complete rebuild. Any help or opinions would be greatly appreciated.
