I've had a transmission service required light come on 4 times now 3 times when driving normal and once when I floor it. The first time the light came on was under normal driving conditions, the car was stuck in 6th in auto mode then when I manually shifted down it went all the way down to 3rd gear and got stuck until i restarted the car. The second time I was on the highway another Evo went by me and I put my foot down the car went down to 3rd then back up to 5th and the light came on. I needed to get to work so I kept driving, when I got to a stop sign my car was stuck in 3rd then once stopped went to first but wouldn't drive. I restarted the car 5 times with people going around me and finally got it to drive and like every other time the light turns off after a few seconds of normal driving. The last 2 times i was just driving normal and the light came on, car wouldn't leave gear and gas pedal wouldn't do anything forcing me to pull over and restart the car. I had the fluid flushed after the second occurrence but doesn't seem to do anything. I used a code reader today and pulled the following code P1855 "Gearbox Shift Drum #2 Movement 1 which i believe could be my issue but I have no clue what the code means. If anyone has had a similar issue or knows of a fix please shoot me a message. Thanks