Bachmann has replacement drive train parts for the 2 truck Climax. I have 3 of them. I sent the one with plastic gears back to Bachmann to replace with metal. Ordered extra drive train parts. Also have a Bachmann 3 truck Climax. Northwest Shortline has replacement gears for Bachmann Shay. I ordered a set for my parts box. I have 3 Bachmann Shays and have not had any problems with them. I have PFM brass Shay and a Roundhouse Shay. I have had problems with them and the replacement parts needed are no longer available. I understand your frustration when parts are not available. The two truck Climax was out of warranty and I was given the option for a higher fee to upgrade the drive train. I would contact the service manager and ask what options you have for the 2 truck Climax.

John