Hi fellas: I have a Lionel 224 and it's started doing something that makes me ask this question. do the drive rods on both sides of a locomotive move in tandem? Meaning do they move together in the same position. My 224 has started locking up out of the blue. One second running next full stop. Then I can't get the drive wheels to move over a forth of a turn, & I notice the drive rods are in different positions. What's going on here?