Put 100k fluid in the center diff. That should help with the front unloading. It will not completely lock the diff, so turning should still be better over the solid center. The traxxas diffs only have 2 spiders, so you have to use thicker fluid than you would on an 1/8 buggy/truggy.
i thought it came from the factory with 500k ? it has what ever it came with in it.
i had 60 wt oil all around. i went to 60 in front and 70 in rear 45mm ride height at skid plates. the truck pulled more wheelies this way. so i am go0nna try heavier oil in the front shocks and lighter in the rear and see how that works..