is there a way to get all four wheels to turn with power on an emaxx
You can get a diff locker or fill the diff with epoxy!
First of all, check to see if your diffs have any fluid in them... if not, start with 100k (not to be confused with 100wt). Locking them down completely will lead to more broken parts.
Whatever it is I just typed... could be wrong.
Are you wanting to climb with it like are you wanting full time posi or do u just want better power transfer between the wheels?
Spools break parts 500K is decent enough, you loose a bit on the turning circle
Google search trumps Wiki. Refer to user guide.
I use silly putty it works out pretty well. Holds well but has some give if you get into a bind.