Hello, got my old 04 g35 Sedsn AT a couple years back done mostly basic fixes like front suspension and valve covers, cam position sensors but recently I started having sluggish acceleration with my rpms staying around 2k and my manual mode does not work right the gear number changes but no change in the rpm's.. and my AT check light flashes at the start of the engine that also has been kinda having a problem where it's taking longer to crank don't really want to dump a lot more into this car if the Transmission is about to go so any idea on where to start would be great.