Alright guys, here's the situation. I just got a 2005 Spectra5 and the CEL was on. I was talking to the kid that I got it off of and he told me it came on when he had to replace the engine at 50,000 miles and not the transmission. Now 100,000 miles later I own the car and want to get the light off my dash. I ran the code and it spit out a P0741 and I have been noticing that when I cruise down the highway the car acts like it having a hard time locking into gear. It mainly does it when I'm right around 55-60mph. It also likes to do it when I driving in town. I know that it needs the tranny fluid and filter but would a plug thats loose be causing this. I would like to get the shaking in the high RPM's. Any help would be greatly appreciated.