Southern Pacific Switching Layout

[Justinmiller171]

The problem occurs on all pieces of track, both straight and curves.

I took the shell off of the engine but I couldn't see any problems

The wheels are slightly oily, there are no visible signs of dirt or other "crud" on the wheels

I did discover that jiggling the wheels slightly seems to fix the problem, but only temporarily

I will check the contacts for the wheels tonight and hopefully I can find the problem.