You dont have to pull the motor to change the ring, just unhook the steering bar on the inside of the boat , and there should be two allen plugs at the top of the drive on the outside that you take out and you can get to the bolt that holds the shaft in, thats how my TRS is. You might need a puller to get the shaft out though. The gimble housing you will have to take out the motor though. I started to take mine apart, but found too many broken parts so its getting a whole new gimble setup at the shop. :rollside: