[AdamHeard]

Originally Posted by Rob2713g

Is it possible to easily attach the fisher price motor to the 25:1, 36mm Planetary Gearmotor, RS-545 Motor? Would there be any problems with this configuration?

In that low of a ratio, the 36mm probably won't be a problem.... But I'd personally go to the 42mm 27:1 just because It is much beefier and more durable.

Also, yes it is possible and easy. Just press the appropriate pinion on, and the correct bolt pattern is already there.