Burning smell coming from motor

So my fury a couple weeks ago had a seized bearing in the rear wheel hub . Just fixed that up today . It ran fine and I thought everything was great again . But when I picked up the car I could smell something burning. I just took apart everything but couldn't find out how to take out the motor . Checked the Diffs and everything seemed fine there . I'm assuming motor is overheating . Definitely due to me not cleaning anything since I've been running the absolute shit out of it. Is this a dont run until I get a new motor kind of deal or is this a enjoy this truck lightly on 2s kind of deal .