hmmm... I have always kinda thought my trans was the problem. Maybe Im lucky and the O2 sensor is the only problem. But with my luck its the O2 sensor AND the trans, lol. No, I actually have pretty good luck, so maybe this O2 sensor which has been bad for 2 years is the root of all my slowness. lol. lets just hope so. Im crossing my fingers. OH YEAH... how much does it cost to have the O2 sensor swapped? Do they have to cut and weld my pipes? I cringed when he said it was behind my cat. it seems expensive.