Yesterday while in traffic, wasnt driving my car hard or anything i heard a clunk sound while rolling in 1st. I looked down at my gauges after it seems like my car was driving very sluggish so i pulled off and read in the manual to turn the car off, etc the restart and the tranny light should go off. After i did this, the tranny light went off, hifting seemed smoother and i could use all gears instead of only 4th, however the check engine soon light is still on.. I am due for service 2 now, could that have any reason why the engine light is still on, and do you think i should mention something to the dealership about my trans light comming on while my car is in the shop? What causes the transmission to mess up like that?