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Thread: PSC XD-II question

  1. #1
    Nothing but a Thing Speedy_RCW's Avatar
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    PSC XD-II question

    So I swapped out my original PSC big bore box with the big bore XD-II box due to some issues with the original. Swap went fine but Iím definitely getting some pump whine while turning. Maybe I just didnít get all the air bled out as I do see a little foam after driving. Thought I bled it well but maybe not enough. I also see PSC recommends their high volume high pressure pump and Swepco fluid. So my question is has anyone dealt with stock pump problems with the XD-2 box and what fluid are you guys running? Anyone deal with pump whine? I have Moab coming up and need to get this squared away by April. Iím just below the minimum line in the reservoir but ran out of power steering fluid so Iím gonna pick some up on Monday and also call PSC to get their thoughts. Maybe the fluid could be the problem. I think Mopar PSF is basically ATF +4 and maybe too thick? Hell I dunno. Just figured Iíd ask here as well to get all the info I can. Thanks in advance.


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  2. #2
    Old Timer wjtstudios's Avatar
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    I did the same swap for the same reason. I did you the swepco flush and power steering fluid and I do not have a whine with mine. I will eventually add the pump just to have the whole system at top performance. The only thing that have noticed is a little lag when you let off the accelerator and the rpms drop quickly and significantly, but in a second they are back up and the steering is back to normal.


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  3. #3
    Nothing but a Thing Speedy_RCW's Avatar
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    Guess I jumped the gun on starting this thread. Today I topped off the fluid and took it for a drive. Had some whine for the first few turns but is running smooth and quiet now. Think Iíll eventually get the PSC pump anyways due to the lag mentioned above but itís not a must at this point.


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  4. #4
    Old Timer DWiggles's Avatar
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    I've noticed the lag more with the clutch in and the engine at full idle, picking the rpms up right off idle solves my "lag" if you can call it that, I'm sure this would barely be noticable if at all in an auto.

    This is with the XD pump, XDII-R box, 1.75 cylinder, cooler, 1/2" return line, and big feed lines...

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  5. #5
    Hooked sunnysideup's Avatar
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    I just finished doing mine today, also running 37's without hydro. I do have the PSC HD Steering gear.
    I washed the old fluid out, and then pumped some new swepco into the system- while the old failing stock pump was attached. Pulled air box- old pump- old stock reservoir.

    The new pump goes on fine, I had no directions in my kit, so I just kind of went off of what I could find from the PSC site and online. From what I can tell PSC wants you to mount the reservoir closer to the pump (within 16 inches) and they want it uphill from the pump. The stock location will not give you that. I noticed online that a number of people mounted it near the battery... which after a close look... I figured out how to mount in there. I took a small funnel and filled the pump through the fitting before attaching the hoses- turning the pump by hand to get air bubbles out, Hooked it all up and let it sit full of fluid while I went to change out the idler pully. Cleaned things up and put the new belt on.... got it all tight. Started it up, and the system never went down through hall the turning of the steering wheel, and no squeals or noise at all from anything.

    I had to drill two holes, cut two hoses, splice one hose... and put a belt on... so it is not a difficult job- even without instructions for the JK ( I did get a random sheet of paper showing bad placements of the reservoir on many different applications)Ö so my guess is anyone with a little skill can do this project. The parts were all of very high quality and everything fit as it should.

    The end result, I can turn when backing up again! I can turn when it's 15 below zero again, my jeep doesn't sound like it is grinding coffee when it starts up in the morning.

    As far as improvements.... it does turn very easily now, amazing how quick you can hit the bump stops when you spin it back and forth. I drove with a bad Steering pump since about June... so everything feels great now, but I can't tell you if it was better than stock because stock has been bad for so long. I hope to get out snow wheeling some more... I'll try to update my thoughts on it when it gets tested offroad a little more!

    The old stock pump is my second one... it had about 70,000 on it... the first one had 90,000... So I hope the PSC will give me those sorts of numbers!
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  6. #6
    Been Around the Block jkbarnett's Avatar
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    Quote Originally Posted by sunnysideup View Post
    I just finished doing mine today, also running 37's without hydro. I do have the PSC HD Steering gear.
    I washed the old fluid out, and then pumped some new swepco into the system- while the old failing stock pump was attached. Pulled air box- old pump- old stock reservoir.

    The new pump goes on fine, I had no directions in my kit, so I just kind of went off of what I could find from the PSC site and online. From what I can tell PSC wants you to mount the reservoir closer to the pump (within 16 inches) and they want it uphill from the pump. The stock location will not give you that. I noticed online that a number of people mounted it near the battery... which after a close look... I figured out how to mount in there. I took a small funnel and filled the pump through the fitting before attaching the hoses- turning the pump by hand to get air bubbles out, Hooked it all up and let it sit full of fluid while I went to change out the idler pully. Cleaned things up and put the new belt on.... got it all tight. Started it up, and the system never went down through hall the turning of the steering wheel, and no squeals or noise at all from anything.

    I had to drill two holes, cut two hoses, splice one hose... and put a belt on... so it is not a difficult job- even without instructions for the JK ( I did get a random sheet of paper showing bad placements of the reservoir on many different applications)Ö so my guess is anyone with a little skill can do this project. The parts were all of very high quality and everything fit as it should.

    The end result, I can turn when backing up again! I can turn when it's 15 below zero again, my jeep doesn't sound like it is grinding coffee when it starts up in the morning.

    As far as improvements.... it does turn very easily now, amazing how quick you can hit the bump stops when you spin it back and forth. I drove with a bad Steering pump since about June... so everything feels great now, but I can't tell you if it was better than stock because stock has been bad for so long. I hope to get out snow wheeling some more... I'll try to update my thoughts on it when it gets tested offroad a little more!

    The old stock pump is my second one... it had about 70,000 on it... the first one had 90,000... So I hope the PSC will give me those sorts of numbers!
    Great info. Iím planning on doing the same. My original plan was to run just the their steering box but spoke with them at KOH and they strongly recommended the pump also.


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