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Sticking / binding steering first thing in the morning?

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7.3K views 21 replies 7 participants last post by  dmulk  
#1 ·
Hey all,

2017 JKU.

Well, I went after my steering issues again and have the quietest steering I have ever had now. The only time I can hear a pump whine at all now is if I'm at super low speed in a parking lot swapping the wheels back and forth and now I only hear it occasionally and very faint. Sounds normal compared to my buddy's jeeps. Feels pretty good too.

Anyway....on to problem two:

I've been noticed that if I get in the jeep, start it up and immediately try and cycle the steering wheel to the left or the right after the jeep sits over night (or for maybe 8-12 hours) it feels stuck. Like very stuck. Almost like it's locked.

if I pull hard in one direction or another it feels like it frees up and then it's fine for the remainder of the time I'm using it. If it sits a few hours it's not enough to reproduce it.

I generally park my wheels straight so I've been remaining consistent with this as I test things since the repro time takes so much time.

Heres what I've done with ZERO change to the condition when tested overnight:

Flushed power steering (twice)
Replaced pump (new seals on lines)
Manually primed pump
Manual Bleed
Vacuum Bleed (and tested at res. No leak)
Disconnected the steering stabilizer
torqued all linkages and lubed

I replaced the steering box last summer along with the high pressure line because I believed my noisy pump condition might be related to a restriction in the box. I also was getting a little bit of play. The condition didn't exist after this.

This problem seems to have slowly evolved after I had new gears, sleeves, unit bearings, ball joints, linkages and axle reinforcements performed. I also have 100k on my Jeep and haven't replaced drive shafts or ujoints in the shafts etc.

I had TF adjustable ball joints and linkage put in and have done a good keeping them adjusted and greased.

This morning I disconnected the steering linkage from the pitman arm and lit her sit for most of the day. I tested and there's no stickage with no load on the steering gear box (I'll reconfirm in the morning).

Since I had a bunch of the work at a local jeep shop and they have a few other minor things to make right I'm likely going to take it in and have them check it out next week if I can't make any more progress on it.

I'm wondering if there is something in the steering gear box that's suspended in fluid and maybe slowly dropping overnight but I haven't seen any evidence of this in either of the flushes.

Would I even be able to feel this if there's no load on the box? (Linkage disconnected?)

Anyone have any theories as to next things to try or of what is going on?

Thanks!

Dan
 
#2 ·
through all of this, have you replaced the factory reservoir? i believe they have a small screen/ filter in the bottom. perhaps it is plugged or contaminated?
 
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#4 ·
Yes I have. Forgot to list that. I'll update the thread. When I pulled the old one there was some junk in it but very very little. It seemed to be way less than most "dirty screens" I've seen on various videos researching this. Good eye and thanks for the suggestion!
 
#3 ·
Hey all,

2017 JKU.


I've been noticed that if I get in the jeep, start it up and immediately try and cycle the steering wheel to the left or the right after the jeep sits over night (or for maybe 8-12 hours) it feels stuck. Like very stuck. Almost like it's locked.
I have a 2017 (leaky steering gear replaced once on warranty) and I get the same thing every so often. I have never bothered to do anything about because it just happens the odd time when cold and it's back to normal after the first crank of the wheel. Iv'e just attributed it to a normal build up delay in pressure.
 
#5 ·
Yeah it's interesting.... It's been happening for about 6 months now and progressively getting worse. It's to the point now that I have to either let it warm up (to build pressure?) or give it a hard yank to "unstick it".

Anyway, this morning I went out there and tested and no stick with nothing attached to the pitman. Hmmm....🤷🏻‍♂️
 
#7 ·
So, reattached the steering to the pitman. Instant sticktion, then freed up. My brother was watching and he noticed the tires looked a bit "notchy".

Could worn ujoints in the axle shafts explain this? I hate to start "throwing parts" at this but they haven't been replaced.

I suppose I can detach the linkage at the pitman again, let it sit, then Jack it up and see if I can manually move the wheels and feel any resistance...🤔🤷🏻‍♂️
 
#10 ·
It could be the TF adjustable balljoints. Maybe the settle down overnight or something like that. Try to park with wheels turned to either side, not straight.
You can also try to jack the front ant whack the knuckles before you start. It is just a blind shot into the night, but you can give it a try.
 
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#12 ·
Update: For the last two nights I've tested parking with wheels full chalked passenger and driver and the problem still exists.

What do you all think about this theory: Worn ujoint in axle shafts causing the stick?

Thanks,

Dan
 
#20 ·
I have a different experience than GP Noir. My PSC Bigbore with factory pump works just fine with 34's. Again, my issue was air in the system and a bad fitting on the high pressure side. YMMV.