I'll give it try. Couldn't see anything to adjust before but I'll look a little closer. 👍🏻

I purchased a Spectrum/Bachmann GEDASH 8-40CW WIDE CAB DIESEL (CSX) #7652 last year and just recently had the opportunity to break it out and test it out. After much frustration I finally got it working and running smoothly. Suddenly the back truck either works intermittently or not at all. When I removed the cab and put it on a test track it seems the rear driveshaft(?) is too short.
I can't find any way to adjust the position of the rear truck. Any suggestions would be greatly appreciated!!