So far I've twisted off two traxxas brand spools for the erevo. first one the advice was my clutch was too tight. this one, it was so loose it wouldnt wheelie and still snapped. anyone else have any trouble??

what kind of driving do you do?

i run a locked diff in my e maxx ''same diff'' but i run jb weld in there and i run it with the mmm/2200 on 5s and its been in there for little over a year and runs like a champ also i run the slipper all the way tight

I have seen those spools break alot , just too much torque/weight for them .

Best bet if you want a locked diff is too either use the JB weld or diff locking clay . Why do you want a locked diff anyway ? The truck will handle/turn so much better without it ......