Power steering issues/upgrade?

[standnnawe]

Hey all...

Hoping someone can help me with what's likely a pretty basic question. I was having issues with a leaky power steering system, so I replaced the pressure hose and pump, proceeded to bleed the system (wheels off the ground). I seemed to develop a leak but couldn't trace it down right away...it appeared to be coming from the pump near a mounting hole. So I replaced the pump again thinking it was a defective seal on the reservoir. Much to my chagrin, after mounting the new pump...same issue. I replaced the pressure hose, checked the supply hose fittings...all seemed good so I bled the system good.

After driving it and letting it sit, I see a leak again. I finally figured out it's coming out the cap after pressure is built up, so I bled the system again. Several weeks now and bottles of power steering fluid later, I can't seem to bleed it completely and it keeps bubbling out of the cap. I've watched the level in the reservoir while having a helper turn the wheel lock to lock...it seems like turning left takes the level down but turn wheel to right lock and the level comes up and out the cap. That doesn't seem to make a whole lot of sense to me. Is it a steering box problem? I don't seem to have any play in the steering wheel.

I really need to put springs on (4" suspension lift when I do), so should I be investing in a different steering setup? Ideas or suggestions?