Well after a month of axle twisting and breaking within 5 minutes of a fresh pack I Finally discover after doing a complete diff rebuild that my FLM Axle cups in my slash 4x4 are causing my diffs to "spool" intermittently and causing extreme torque damage to my axles.
All new internals and all.
I sheared heads off FLM alxles,sheard MIPs and destroyed plastics

.
After returning to stock plastic diff cups I FINALLY got to run 2 complete battery packs

.
You can see in the cups where the side spider gears are grinding into the cases.
Is/was there a bad batch or am I a lucky winner of a one off chicken dinner?
lol.
Haven't contacted FLM as of yet about the diff cups altho I do not expect any troubles of getting this remedied.
Now to ship it all back.:P
@ least the center diff and mount are holding up flawlessly

.