The AW 55-50SN transmission has many problems and one of the chief is with its bushings. The planetary bushing fails most often and we are seeing stator and sun gear bushings spinning out also.
We have made a one piece rear sun gear bushing, pictured at right with hole, to replace two small bushings. Our one piece bushing has greater holding power.
The one piece planetary bushing is not included in the bushing kit. It must be purchased separately. Part 31418A.