handling problem , help needed.

[twisted8]

hey guys, i am getting closer to getting my emaxx to handle better on the track but its still off.

1st i have the following:
kershaw lcg chassis
mmm 2200 combo
4s 5000 40c lipos
traxxas response tires
traxxas center diff with factory oil (100 or 500k ?? )
front and rear diffs with 60k
proline power strokes with 60wt
tranny is moved forward as well as the packs

problem:
center diff wants to unload and im loosing acceleration.
i have the punch on 70% and a slight curve in the throttle profile set on the esc.
the wheelbase is 13 1/2 long.

if the center diff comes with 500k i cant go any higher with diff fluid...putting the spool back in would just make it a wheely machine and i dont want that either.

im thinking of playing with the shock oil and or the front and rear diffs but iam up in the air on what to actually do to help the problem.

any ideas would be appreciated.

thanks !