Ok. I had this same prob. And one of my axle pins came out of the trans side. Car would not move. Did u checl this?
I like you attitude, things happen sometimes...When I bought my second one I broke it in and on the first outing the rear wheels stopped pulling, come to find out the pins in the axles on the rear were missing, they didn't put them in from the factory. Been smiles every since.
I know nothing about revos but have you checked the diffs? Also check the driveshaft.