Futaba 3PM FM with HRS not working with 2 controllers

[ncalenda]

Here is my setup:

9xl with rcm heatsink
51/16 (strobe)
5S 8000 MaxAmps

I have the e-maxx but put on RPM arms, pro-line shocks (only 4), rpm axle carriers, mip axles, alum diff case, etc.

I did a roll test, I push it and it seems to roll fine. My spider gear did end up going, but woudl that cause enough friction?

Should I check my bearings? We do run in the sand and they do get gritty at times. I haven't changed them in months.