The Crawlabago is back under the knife. NV4500's aren't as bulletproof as they say. I will give credit, it made it back from AZ to Denver with a wicked growl and no 4th gear.
Input bearing failed and killed the integral release bearing. Shrapnel caused 4th gear to get progressively worse as it wouldn't stay in gear when you let off the throttle.
I'm picking up a fresh rebuild in a day or two.