model # 917.203900 all plastic tranny case and appears all components on external plastic also, symptoms loss of drive, I pulled deck checked main belt, its on pulleys nice and tight, the other smaller belt still on pulleys tight also, tried pulling and pushing in hydro disconnect and trying same result pulled rear fuel tank to look for anything obvious nothing jumps out at me. Went to sear parts direct looking at schematics get some idea what to check, read some forums on this tractors trans and a few dissatisfied customers, they claim having replacing complete trans 2 in only a few yrs time at $649. a pop. Any help in common know issues would be very helpful
Thanks in advance