My Robitronics is the same way. I just replaced all of the gears in the front with new Robitronics ones and put 7000 1000 1000 to try and calm the front down a little. It didn't work. The truggy seems like it's FWD as well.
Axial is pretty much an HPI engine, by the way..

This truck is pretty much a HellFire in my opinion. Nice as a second truck for bashing and whatnot.