torque split shouldn't make it feel like its pushing from the rear its only the amount of power supplied not changing and turning speeds of each side of the box.
I had issues with my r33 vspec, so I just ran 12v to the pump and it ran at full system pressure which I think is around 300 psi and just ran full time 50/50 4wd and it felt fine, I cant see how the torque split could make it feel like its pushing or pulling out of sync ?
are you 100% sure both diffs are the same ratio ?