Thanks for the explanation, Norton.
Am not trying to be a budinski here, but why would Lionel use a different set of drivers and rods for presumably the same engine produced in the past? And, So I know a little about what I am reading, what is BEMF and RCMC stand for and what do they do?
Can't answer why they used different components. Maybe a different factory is making them but the formite who did the swap said the fasteners were different.
I am getting curious why its taking Lionel so long to determine the cause. Maybe because the fix will not be easy or cheap.
BEMF= Back Electro Motive Force. Same technology used in Electric RR cruise boards.
RCMC= ???? Its the newer Lionel receiver motor driver board all in one.
Pete