rumbling spectrum ge e33

[pepegalego]

Hi,

I've got a spectrum ge e33 virginian with a lenz decoder. Beautiful machine.
However the engline "rumbles" as if something were grinding. I have only run it a couple of times an I get the rumble. Is this normal?

Also what is the tightest radius this will run on. I don't want to redesignmy layout just for one loco.

thans