I have the full PSC system on my JK and it does not feel flighty and definitely no growl, do you have enough fluid in the reservoir?
Did you use Swepco fluid?
Where yours is mounted, curious to know if it bottoms out on full right turn or extend to limit at full left?
I used Swepco fluid. It's one inch from the top of the reservoir per PSC recommendations. I get full extension in both ways. Well almost. If you measure the arch your steering will travel it's 6.75". At least mine is. The cylinder arm extends 6.5". As best as I could I tried to split that 1/4" but I doubt it makes any noticeable difference. And I'm probably over exaggerating the noise. It isn't a whine like a pump starving for fluid. It's just...louder. I notice this one whereas with the stock steering system I never noticed it. It's probably normal to make more noise since it it pushing a higher volume of fluid at greater pressure than stock. It isn't a "something is wrong" noise. It's just louder.
You must not have things installed right. Mine has never felt flighty and drives awesome on the highway. I also don’t notice any noises like your describing. Your ram looks too far driver to me
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I covered above how I have it installed. I posted a diagram. I also talked about how PSC has the diagram backwards in the way the hoses connect to the cylinder. At least on my kit if you connected the hoses the way the diagram shows you'd get a bind from the cylinder extending as you turned right. I also have the reservoir mounted as high as I can above the pump. But you are limited in your engine bay where you can achieve this. I did it according to where PSC recommends in their JK install instructions, which are fairly old. PSC also stated that the hose from the gearbox to the pump can't be longer than 16". In fact, they don't even send a hose longer than that in the kit. I think I cut the hose in half when I installed it so from fitting to fitting it's under 12". Can you explain why the cylinder being too far driver would be an issue? As long as the cylinder arm can fully extend and retract it should make no mechanical difference at all where it mounted along the tie rod. In fact, the further to driver you have the cylinder mounted the less hose you need and that means the less hose that is going to bind, pinch or rub on something else.
I wouldn’t say mine is flighty on the highway, but the steering it is more sensitive when you compare it to a stock Jeep or my Ram. It should not make any noise. Having air in the system can cause both of those issues you are having. It takes multiple cycles purging and filling to get all the bubbles out of the system. You need to have someone inside the Jeep turning the steering wheel with the engine off from full lock to lock while you can watch bubbles coming up in the Rez. PSC has instructions on their website.
2015 JKUR AEV JK350
1985 CJ8 Scrambler
I'm almost certain we got it fully bled. This is my second gear box install so I'm familiar with the procedure. It's a possibility we didn't get all the air out but after an hour of turning the wheel nothing more was popping up and the fluid level is holding constant. I will say this system took a lot longer than the the stock box did to bleed, but there is more fluid also. I'll go through the procedure again just to make sure, however. Not a bad recommendation.
I think what has happened here is it has made my Jeep already sketchier than it was to begin with. I've had this Jeep a bit over a year now. It had 87,000 miles when I got it and I've spent almost as much on upgrades and wear parts as I did for the Jeep. It's obvious the previous owner(s) never did a lick of maintenance on this thing. Right off the bat I noticed how terrifying this thing was to drive - at any speed. So immediately replaced the ball joints and shocks, along with brakes and u-joints. That wasn't a huge improvement so then I replaced the stock gear box, which I saw was leaking fluid down the sector shaft, with a remanufactured one. That wasn't a huge improvement either. Next step was to replace tie rod, drag link and track bar with the Steer Smarts XD stuff. That actually made a really big jump in handling. I also threw on a Tera Flex adjustable track bar on the rear. But it still wasn't real stable above 75 mph. So then I did the Core 4x4 adjustable control arms. Right now caster is about 5.3 degrees. I know PSC recommends 7 but that would put the pinion angle too steep so maybe I'll try for 6 and see if that helps.
To me, the steering on the highway just feels looser. It probably just accentuated the other issues I was already dealing with. The only thing left now to change would be the tires and that's probably not a bad idea. I have Nitto Mud Grapplers and they are getting chewed up from Moab.
I often wonder if this Jeep is cursed. It still has other issues I need to solve. I could fill this forum up with threads on problems I still have. It's not a daily. I go to Moab every weekend and wheel it. It gets beaten on. Maybe a short wheel base vehicle with a 3.5" lift and 35" mud tires isn't supposed to drive good on the highway. It does very well on the trails though. I'll probably have to trailer the damn thing when I put 37s on it.
