for me it has always been a heavy diff oil in the front vs the rear... but as for the shock positions i would lay the front ones out more lateral and a little more straight up in the back. as for oil weight....again heavier in the front vs back... thats my 2 cents for 4wd onroad...
other then that, can you dial out some steering on your remote?
i have also had too much steering causing your issue....opposite side of the coin......