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Old 04-15-2017, 02:06 PM
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How bout a pump, would that increase flow/steering power??


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Old 04-16-2017, 11:49 PM   #62
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The only weakness in this design is that 100% of the steering pressure goes to the drag link and it puts a ton of pressure on the steering box (which is known for pulling away from the frame). Be sure to brace it. Standard hydro assist sends 50% of the force directly to the tie rod and takes pressure off the steering box and drag link. However I think this setup is going to give you much better street manners than standard hydro assist. It also has fewer hoses, fewer connections and fewer places to leak. I think it is a nice option (but I am not removing my Hydro to switch to it since my money is already sunk into my PSC solution).

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Old 04-17-2017, 05:30 AM
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The only weakness in this design is that 100% of the steering pressure goes to the drag link and it puts a ton of pressure on the steering box (which is known for pulling away from the frame). Be sure to brace it. Standard hydro assist sends 50% of the force directly to the tie rod and takes pressure off the steering box and drag link. However I think this setup is going to give you much better street manners than standard hydro assist. It also has fewer hoses, fewer connections and fewer places to leak. I think it is a nice option (but I am not removing my Hydro to switch to it since my money is already sunk into my PSC solution).


Agree with steering forces on the box/sector shaft. Thats the point of a bigger more robust box and sector shaft. What i have never seen or heard of personally is the box pulling from the frame. There is no current sector shaft braces available for it. I have the Synergy track bar brace but that does nothing for the box. Ive actually thought about upgrading the bolts from the factory grade 5 (I believe) to grade 8-9. I dont know if that will help or not.


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Old 04-17-2017, 07:53 AM   #64
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What i have never seen or heard of personally is the box pulling from the frame.
This happened just a couple weeks ago to someone in my local club:


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Ive actually thought about upgrading the bolts from the factory grade 5 (I believe) to grade 8-9. I dont know if that will help or not.
Judging from the above picture, the bolts aren't always the problem.
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Old 04-17-2017, 08:22 AM   #65
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Agree with steering forces on the box/sector shaft. Thats the point of a bigger more robust box and sector shaft. What i have never seen or heard of personally is the box pulling from the frame. There is no current sector shaft braces available for it. I have the Synergy track bar brace but that does nothing for the box. Ive actually thought about upgrading the bolts from the factory grade 5 (I believe) to grade 8-9. I dont know if that will help or not.


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I found these two threads in under 5 seconds im sure you can find more
ripped the steering box mounts off box. - JKowners.com : Jeep Wrangler JK Forum

Shop tells me steering box shifted - death wobble from minor pothole - opinions? - JKowners.com : Jeep Wrangler JK Forum
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Old 04-17-2017, 08:24 AM   #66
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IMHO this is an expensive and foolish option if you intend to wheel your vehicle. I have personally seen a steering box sheer clean off the frame at rausch creek. Not the bolts but the actual frame sheered. The driver was only on 35s inn a rock garden. The frame becomes vulnerable and will be a hellish fix whether on the street or on the trail. This bigger box will put even more pressure on the frame and bolts. I just dont see the bang for buck here with only 30% more turning force. Add a pump to that and now you are over 1g for an inferior solution to hydro assist. A hydro system from WTO is cheaper than the box alone. Lastly the road manners with a properly set up hydro system is nothing short of fantastic. I will never go back to stock. The only true fix is hydro assist for worn and broken steering boxes not to mention gives you the turning force you need offroad
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Old 04-17-2017, 10:01 AM
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This happened just a couple weeks ago to someone in my local club:




Judging from the above picture, the bolts aren't always the problem.

Um thats a YJ LOL


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Old 04-17-2017, 10:03 AM   #68
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Um thats a YJ LOL


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Yeah but I mean, it's the FRAME that broke. Doesn't look like rust was a contributing factor either. Frame seems to be in good condition around the break.
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Old 04-17-2017, 10:14 AM
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Yeah but I mean, it's the FRAME that broke. Doesn't look like rust was a contributing factor either. Frame seems to be in good condition around the break.

I believe the JK has the strongest frame of them all.


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Old 04-17-2017, 03:00 PM   #70
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Psc will have a ported version for 40's plus in the near future.
Did they give you a timeframe when the ported version would be available? Thanks.
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Old 04-17-2017, 03:43 PM
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Did they give you a timeframe when the ported version would be available? Thanks.

I forget the dates, PSC did say at one point on FB.


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Old 04-17-2017, 05:29 PM   #72
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Yeah but I mean, it's the FRAME that broke. Doesn't look like rust was a contributing factor either. Frame seems to be in good condition around the break.


So all the rust pitting on the outside of the frame where it has been sanded down and all of the built up rust on the inside of the frame rail had no contribution to the frame break? You do see how thin the metal is in the area of the break due to rusting don't you?


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Old 04-17-2017, 05:50 PM   #73
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So all the rust pitting on the outside of the frame where it has been sanded down and all of the built up rust on the inside of the frame rail had no contribution to the frame break? You do see how thin the metal is in the area of the break due to rusting don't you?


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Ok looking back I could be wrong on the rust. Just looked dirty from my phone at the time.

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Old 04-17-2017, 08:05 PM
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God my 92's frame was a mess. TJ's wasnt much better after 10 years.
Rust is brutal here in the NE.
Thank god for Fluid Film


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Old 04-17-2017, 09:55 PM   #75
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Rust never sleeps and gravity alway wins....


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Old 04-17-2017, 10:48 PM   #76
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Rust never sleeps and gravity alway wins....

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My thoughts as well. I am probably relatively safe from rust with my Jeep in Arizona. But, I am starting to see more "hidden" downsides to the XD gear box and moving more toward the side of biting the $$ bullet and going with the hydro-assist. I have a little time to make a decision because I do most of my mod work in the summer when it's so damn hot I don't wheel much.
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Old 04-17-2017, 11:14 PM   #77
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Did they give you a timeframe when the ported version would be available? Thanks.
At EJS the word around was PSC had not figured out porting yet. I also wheeled with 2 rigs with the new box and they hated them. Could not turn at all with the front locker engaged. Both rigs had UD60'S with elockers. They needed the lockers engaged when trying to turn. One guy had 40's and the other 37's. The guy with the 37's was pissed and had his rig swapped back to hydro assist while in Moab. Lol. It would be great to hear from people have really wheeled them.

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Old 04-17-2017, 11:17 PM
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At EJS the word around was PSC had not figured out porting yet. I also wheeled with 2 rigs with the new box and they hated them. Could not turn at all with the front locker engaged. Both rigs had UD60'S with elockers. They needed the lockers engaged when trying to turn. One guy had 40's and the other 37's. The guy with the 37's was pissed and had his rig swapped back to hydro assist while in Moab. Lol. It would be great to hear from people have really wheeled them.

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Last story i heard was 2 guys with 40's. Id like to get real world feedback rather than hearsay.



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Old 04-17-2017, 11:27 PM   #79
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I am patiently waiting for some real world feedback from people running 35s and 37s with lockers and doing some rock workouts. I already know I can drive it to the mall and back but I have no problem doing that now.
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Old 04-18-2017, 07:53 AM   #80
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Last story i heard was 2 guys with 40's. Id like to get real world feedback rather than hearsay.



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I was right there with them. Spoke with both guys as we wheeled. I actually wheeled with with 3 guys with the box. 2 had 40's but having wheeled with one of the 3 for 3 days not sure he had box issues more of a driver issue so I am not really taking his assessment with much value.
I would like to hear what others have to say. I think the box sounds like a good idea just seems to be pricey at the 30% stronger claim. If it truly is an improvement it would be a nice solution for many who never truly wheel very hard. I have hydro assist and love it and have been running hydro assist on various rigs for over 15 years without much of a problem. There are cheaper solutions for assist even for those without much wrenching ability.

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Old 04-18-2017, 08:08 AM   #81
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I think the point is that a review of a product that consists solely of third party statements of "I hated it" has no real merit. Imagine if I was a restaurant reviewer and wrote an article that said, I didn't eat there, but I met some guy that said the food was terrible.
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Old 04-18-2017, 12:54 PM   #82
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Agree with steering forces on the box/sector shaft. Thats the point of a bigger more robust box and sector shaft. What i have never seen or heard of personally is the box pulling from the frame. There is no current sector shaft braces available for it. I have the Synergy track bar brace but that does nothing for the box. Ive actually thought about upgrading the bolts from the factory grade 5 (I believe) to grade 8-9. I dont know if that will help or not.


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JKS and synergy both make steering box braces - JP Magazine lists frame flex at the steering box as one of the issues of JK steering (of which there are many issues) "JKS has developed a unique reinforcement kit that beefs up the track bar and steering box mounts, and also adds a double-sheer pillow block bearing on the bottom of the sector shaft"

This is a clip from the JP magazine article "Along with prematurely worn ball joints, incorrect toe settings, or wasted tie-rod ends, a contributing factor is often a worn steering box. The JK’s extra-long sector shaft imparts more leverage on the sector shaft bearings inside, especially when a dropped pitman arm or big tires is thrown into the mix. The framerail can also flex under heavy steering input and the track bar frame mount, located directly under the steering box, can flex, crack, or completely break with hard use."

I have seen this frame rail failure first hand (fortunately not on my Jeep but with 2 different guys I was riding with - one on 40's and one on 37's). That is why I advocate bracing the frame mounts for the steering box and track bar if you are going to do this upgrade. It's cheap protection that 30% additional force must be accounted for. Newton's 3rd law states that when one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body. There is no cheating physics
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Old 04-18-2017, 01:00 PM   #83
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There is no cheating physics

Sure there is... haven't you ever seen a boob job?
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Old 04-18-2017, 01:37 PM   #84
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Now I find out my steering box needs a boob job. This Jeep is driving me to the poor house.
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Old 04-18-2017, 01:45 PM   #85
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All I can tell you is this... I saw (in person) a 2dr JK with 37s and a PSC box in it park along a cement wall with the tires scrubbing. She turned the wheel and pushed the Jeep about 10 inches off the wall on an asphalt surface. I saw this the day I picked up my box. The turning power generated by the box IS NOT the same as hydro assist but it is considerably better than the stock box. Like I said in a past post, you aren't going to one finger the wheel when your running around in a rock garden with the front locked up with 37s but you will have the ability to steer with a little effort which is more than you could do with the stock box.
If I was building something that was just built for the rocks then ORE would have suggested I go Hydro assist as it is just a better option for that environment. But I was looking for a few different things in my build and the box fit my needs perfectly. I wanted a solid driver on the streets and highway, I wanted the durability of the larger sector shaft, I wanted a little more turning power when I'm locked up climbing hills or through the mud, I wanted less parts to fail, less hoses and fittings to leak and I didn't want to replace power steering pump. BTW it's a WHOLE LOT LESS $$$ then a full blown hydro assist. The frame will not be an issue with what I do. I know everyone else here seems only to drives their Jeeps through rock gardens, enormous 3 tiered ledges and black trails but mine not so much. I drive the sandy beaches, tackle the blue trails for the most part, camp and explore the trails and fire roads north of me. If my tire is in a spot I can't turn the wheel I'll back up or move forward a little. I find myself in the rocks here and there but I try not to make a day of it. I like to move along and see what I haven't yet.

I really think people are trying to compare two different products designed to support two different applications. You have to decide which one you fall under.
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Old 04-18-2017, 01:56 PM   #86
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JKS and synergy both make steering box braces - JP Magazine lists frame flex at the steering box as one of the issues of JK steering (of which there are many issues) "JKS has developed a unique reinforcement kit that beefs up the track bar and steering box mounts, and also adds a double-sheer pillow block bearing on the bottom of the sector shaft"
Given that the XD box has a larger sector shaft I would think the JKS steering box reinforcement kit would not work. The kit I saw was $375. Do you have any info on the fitment for this application? Thanks.

Wrangler JK Front Trackbar and Sector Shaft Reinforcement Kit

SYNERGY MANUFACTURINGÂ*::Â*SteeringÂ*::Â*Synergy Jeep JK Sector Shaft Brace
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Old 04-18-2017, 03:09 PM   #87
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AI really think people are trying to compare two different products designed to support two different applications. You have to decide which one you fall under.
You are correct. I plan on removing my Hydro Assist and putting this box on my Jeep right before I give it to my grandson - the driveability will be a much bigger issue at that point and this box provides better driveability with stronger steering for that purpose. Right now the Jeep is not driven on the street much and spends it's time in the garage, on a trailer or on the trail and the PSC Hydro is the correct solution. When I give it to my grandson next year as his daily driver I will drop down to 35's, remove the Hydro assist and put on the PSC Box to make it a better daily driver. (the Hydro will be moved to the Jeep I will be building for Grandson number 2).
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Old 04-18-2017, 03:18 PM
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The JKS brace focuses on a stock box and leverage with a DPA.
Neither JKS or Synergy will work with the stock sector shaft. My Friend talked to Synergy about developing a brace for it but they said it would not be any time soon.
If you look the HD's sector shaft nut .. is moved closer to the track bar. A add on support would put it right on top of the TB.
We would need something like what i believe TF makes that braces the box itself to the opposite frame rail. Only issue with theirs its part of a highsteer kit lowering the track bar.
I would think something like that could be made fairly easily.



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Old 04-24-2017, 10:56 AM   #89
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Some have asked for some real world results with the box. I have some now to report.

The box is everything I had hoped it would be. To start with the install, one word.... Simple! It is heavy so I would recommend a friend to help or do what I did and just sling the box from above with either an engine hoist or chainfall. A couple quick height adjustments and it fell into place. Everything mounted up easily (don't forget to install the new included orings on your hoses) and you will need an 1 5/8 socket to torque the pitman arm nut. It purged the air out in a couple minutes and no leaks. Couldn't have been easier.
Now to drive it. It feels tight on road with less steering input required. Almost like finding an extra degree of caster. It has a noticeable increase in turning torque even driving slowly around the parking lot. My Jeep drove well before so based on the on road handling aspect of the PSC box it's nice but not enough of a difference that I would recommend installing one at that price for strictly the on road steering gains. Off road is a different story. Lower the 37 x 13.5 tires to 12lbs and lock up the front diff. Almost impossible to turn at a stop with the stock gearbox. I wanted a fresh measuring stick so I did this in a packed dirt parking lot out in front of my shop right before bringing the Jeep in to swap the box. After? Could totally turn the steering wheel with just a little bit of effort. You could hear the power steering pump load up a little but the wheel turns just fine. For how often I am doing that on the trails up here in the northeast it is completely acceptable. If I wheeled rock gardens all day I would recommend the hydro assist because at the end of a long day crawling in the rocks locked up your arms will be tired with the PSC HD Box. Doable but tired.

So the end result for me was great! I get a substantially stronger box with enough turning power for my aired down 37s that was really just an easy bolt in. On road steering is tight and improved over stock and I expect true offroad performance to be vastly improved. I will be taking a trip out to MaBell next weekend and look forward to the steering improvements that this box offers.

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Old 04-24-2017, 12:01 PM
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Awesome review Rich Thanks.



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