While running my K-Line TMCC-equipped Pennsylvania K-4 Pacific (K3380-5358CC) today at a train show, I noticed that there was a slight lateral movement or "wobble" of the locomotive as it moved down the track. With the pick-up rollers still making contact with the middle rail, we lifted the drive wheels off the track to check and see if there was anything binding. Everything appeared to be moving freely from what we observed. The traction tires were seated properly, so there was no uneven spacing of the wheels. Any ideas what could be causing this, or is this just a normal trait for these locomotives?
