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do the lines going to the steering box have o-rings on them?
I replaced my steering box with a reman box, and now the system will not hold fluid when the whels are being turned. it holds and does not leak at idle.
I'm pretty sure there are no O rings. If you're sure you have the fittings tight, I would remove the fittings an check for residue or part of a plug remaining underneath where they are supposed to seal. Also check the surface where they are supposed to seal for any burrs or pits. You may have gotten a bad reman box.
Well, after a little more digging, found that they are o-ring on the pump end and inverted flare on the gearbox end. Hey OP, you didn't put thread tape on it, did you? That is a no-no for anything but pipe threads!
Sorry about the delay in posting I had another issue with the truck that has kinda put the steering box on hold, blew a freeze plug in southern CA weather (wtf). truck will be back on the road when the steering issue is fixed but it wont be long until the motor gets rebuilt.
I went and got some degreaser and am gunna clean the area tonight and look for leaks in the system and hopefully find them.