My 05's Output shaft bearing went at 90,000K. I changed the bearings and shaft myself but it is a big job, mainly to do with the weight of the rocket motor. Either the frame has to be lifted from the motor or the rear of the motor lowered to get enough access to remove the output shaft cover. I think in most cases the output bearings (2) could be swapped out and new gaskets and seal, without replacing the shaft and the cover. A few captains have carried out the repair with great results. I think it took me about 30 hrs of work being super cautious. Good luck