2 Truck Shay Model Numbers

[whunteman]

The 2 Truck Shays have at least 3, maybe 4, model numbers.  I believe the model number are 81196, 81197, 81198, and possibly 81999.  What are the differences between the models?  Can I use the replacement trucks on all of the models?

[charon]

The 81xxx shays are the 36 ton first gen models and the replacement trucks will fit.
The 82xxx shays are the 38 ton sec gen models.
The xxx are the different road names.
Chuck

[Joe Zullo]

Can I use the replacement trucks on all of the models?

The replacement metal trucks can be used on ALL models.