1/8 buggies and electric conversions some questions

[hemiblas]

I have a couple questions on 1/8 buggies. A long while ago I picked up an rd logics 1/8 buggy. Converted to electric, first run broke a rear driveshaft. These are hardened steel. On the second run I shredded the rear diff. Put that project away. Then I recently bought an ofna lx2e. First run the front center diff seems to have exploded. I used the same setup in both. Mtronicks truck esc on 4S with a feigao 8l motor, 14 tooth pinion.
I still run my emaxx truck still with my feigao 7xl which is a much more powerful motor with no issues.
Are buggies just not up to the task of brushless power? I cant believe that I have broken two buggies and its just coincidence.