E-Maxx ball type differential

[Gustav]

The problem of a ball differential is that it would slip in high torque applications.Basically it's either so tight that it doesn't slip but heats up anyway when it diffs out due to the friction of being so tight(also the diff action is too tight).Or if it's loose enough not to heat up too much when it diffs, it will slip and melt almost instantly.

The nearest thing to a sort of giant ball diff you're talking of is in the new Schumacher Havoc,that thing may well handle the torque,certainly handles way more than a basic 4200 already.You're better off with a viscous geared diff though,the main advantage of ball diffs is the weight and ability to make small quick adjustments.