@John4884 posted:I am looking to add a non-powered UP diesel to pull behind my Big Boy, as is done by the restored 4014.
I would first suggest that you search the internet, YouTube specifically, and see exactly what sort of "modern" GE diesel unit/units they have been using behind 4014. Then, you will also find exactly which road number you need.
Is there a non powered version that still has the smoke and rail sounds feature set?
I don't think either Lionel nor MTH offer non-powered "dummy" versions of the current "modern GE" diesel units.