Has anyone found a replacement gear for the drive axle in a C-19? I'm trying a rebuild with this motorgearbox but Bachman doesn't offer the final drive gear.

Hello,
Could you tell me if the gearbox in the C-19 1:20.3 scale engine is metal or not?
I'm contemplating changing gears in an existing engine I have that's had four separate failures. The longest the engine has run is three and a half hours. I'm not going to send another fifty dollar check for gear replacements that clearly don't work. Thanks









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 Has there been a revision/update to the gearbox on the Connie? I ask because I've stripped two gears out, the last one after less than ten hours running.
I use the engine at shows our group, the Wisconsin Garden Railway Society participates in. This means that the engine in question runs on a level inside oval with 20' radius curves, pulling 8 to 10 cars at a moderate speed.
The first time I replaced the gear I missed seeing the shaft the first nylon gear rides on, the one that strips, is very loose on both ends where it mates to the gearbox halves. I believe this looseness is what causes the gear to strip out. The motor is solidly mounted to the gearbox and the screws in the gearbox are tight. I LOVE this engine but I'm tired of replacing gears.