Just received my Vision Bigboy engine today.
Eagerly opened the box, took out the engine, then I saw a few parts fallen out. My heart sank (considering the money I spent on this).
Turned over the engine and this what I saw:
Both gear box covers had fallen out! It took me a while, but fortunately I found the 4 tiny screws in the box.
There are not much grease in the gears either. It is hard to believe that all 4 screws came lose during shipping, unless they were not tighten properly during assembly at the factory. I wish Lionel would have better quality control for their top-of-the-line product.
So be very careful with your new engines when you receive them. Inspect them very carefully and tighten all (maybe put a little bit of thread lock on them - Lionel could have done this too). Don't rush to run them right away, you can definitely damage them.