Both of my skis are now running!!! So I am getting ready for a trip to the water for the first time with them in a couple of days. I replaced the pump oil in both. Started them on the trailer and the GSX is pretty quiet. Just motor sound. The GTX has a rattle sound somewhere in the back. Not real bad, not grinding, kind of ringing/clanging. Is this the rattle that this thread is talking about? If so, I wont worry about it. If not, then what do I look at? BTW, this is with the seat on so it seems external, not under the seat. The wear ring looks good. I am pretty sure the sound was there before I changed the oil so I do not think I caused it.