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  #1  
Old June 12th, 2019, 21:04
moparcyco moparcyco is offline
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Psc big bore box swap issues

Anyone here running one? Had a stock box on 37's tons etc. Finally gave it up couldn't really turn locked. So put a modified wj pump on helped a bunch. So I bought the Psc box supposed to be a lot more powerful than stock right? put the first one on turned great to the left but anything going back to the right had a horrible sound. Called Psc they had me send a video they said definetly a hydraulic issue. sent me another box installed this one now it makes the noise both directions. The pump does not make a sound could I have lost pressure or are these things junk?

$800 is a lot to pay plus I'm using swepco fluid at $10 a quart this is getting expensive. Anyone run into this before? Thanks
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Old June 13th, 2019, 06:20
sandfreestyle sandfreestyle is offline
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Re: Psc big bore box swap issues

is this before or after getting the air bubbles out?
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Old June 13th, 2019, 07:12
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cal cal is offline
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Re: Psc big bore box swap issues

I'm going to guess that the pump is at fault here.

PSC boxes are def not junk.
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Old June 13th, 2019, 08:16
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sidewaysstarion sidewaysstarion is offline
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Re: Psc big bore box swap issues

The issue is with the big bore box, it requires more fluid from the power steering pump, which is why it's whining when you turn. Do you have a video of the sound it's making?
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Old June 13th, 2019, 08:28
Black1990jeep Black1990jeep is offline
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Re: Psc big bore box swap issues

Your pump maybe the issue. many makers suggest a more powerful pump or at least a stock one that is up to the job when going to a bigger steering gearbox. PSC has a good reputation. AGR on the otherhand sells junk, the owner lies to you on the phone, if you can even get a hold of him.

I suggest trying a new or upgraded pump eventually. see what PSC says about the pump. yoru pump maybe on its last legs for instance, not enough umph to work with a bigger gear box.
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Old June 13th, 2019, 20:36
moparcyco moparcyco is offline
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Re: Psc big bore box swap issues

The pump is a 2001 wj pump from 4.7 with the hydraulic fan. has xj pressure fitting drilled to 5/32. I was going to wait and try going to 3/16 but I've been told that is absolute overkill. Called Psc today they gave me a list of things to check. If you use a stethoscope you can hear its the box. even pulled the pitman and cycled the wheel with no resistance with the scope you can still hear it in the box. We also had it on a hoist with the pitman disconnected and cycled the steering by hand there is nothing binding. I am 100% sure its the box. they say there is no way I could get two in a row bad. I work in Auto parts guess what happens all the time.

I just hope there service is as good as everyone says. And they will help me. I'll let you guys know what happens.
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Old July 6th, 2019, 06:09
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denverd1 denverd1 is offline
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Psc big bore box swap issues

Hydro assist it already

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Old July 8th, 2019, 10:18
Pleasuretek Pleasuretek is offline
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Psc big bore box swap issues

I am running a psc big bore in my xj. No funny sounds. Did you flush your pump and lines before installing the new box? Did you bleed the lines by turning lock to lock 30 times without the engine running(before you start the pump the first time)? And then start the engine and keep bleeding for another 20-30 lock to lock turns?

You might have gotten air bubbles in your pump and worn it out. I am using a psc big bore xd with a stock steering pump with no issues.

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