Mid South Hobbies (thank you Hector) diagnosed and fixed my X-Maxx.
The differential needed servicing as 40 runs was a bit too much without maintenance—and yes I’d neglected it after a lot of driving. It wasn’t transferring power at all due to neglect (by me) and simply needed PMCS. Cush...
The video is self explanatory.
I was on dirt jumping and bouncing along, but the donuts in the dirt didn’t help as that is when things came to a standstill. Grinding sound from the rear and no forward/reverse.
Steering works but a grinding sound exists.
Mid South Hobbies figures it is...