I have two MTH DAP BNSF Daylight (1 my Uncles & the other my Dad's) and they both stutter when running between 0 to 15 SMPH. The stuttering is more pronounced when running forward. In reverse the stuttering isn't as bad. I've checked the tach tapes on each flywheel and they seem to be fine. What could be the issue?
Here is a video showing what is going. Sorry for the shakiness. Engine was running at 5 SMPH going forward and about 10 SMPH in reverse.
Thanks in advance for your help and input.