Power steering problems

[jbs11]

2016 LC, 85k miles
I’m having a problem with my power steering (I think). I’m on vacation (isn’t that always the way it goes?) so no access to my shop/tools to aid diagnosis. Over the last couple days the steering has become much heavier. It it not a “constant” heaviness, but sort of increases as the wheel turns, reaches a maximum (at maybe 45* of steering wheel rotation), then drops off. That seems to repeat against the turn continues (I haven’t done a bunch of tight turns so this isn’t well characterized)

Power steering fluid level is fine. (Fluid (ATF of course) was changed by me when I bought it at 58k)
Does this sound like a PS pump or rack problem?
It’s not terrible to drive (other than in parking lots), so is it likely safe to wait until I get home to diagnose/fix?

Tips on what else to check to narrow it down?
Thanks for any advice!

broc

 

[jbs11]

Post #4 here sounds exactly like my problem. That u-joint is definitely very rusty so I’m going to try the multiple soakings with penetrating oil...

 

[jbs11]

For anyone who encounters this in the future: the WD-40 ( not normally a fan but easily available) I’ve been spraying on the intermediate shaft u-joint multiple times per day has definitely made a difference. That should get us home where I can replace the intermediate shaft properly.

 

[04UZJ100]

If that joint is rusted to the point of being difficult to operate - what does the test of your truck look like?

 

[jbs11]

If that joint is rusted to the point of being difficult to operate - what does the test of your truck look like?

Actually pretty good for a northeast truck. I am surprised it is that bad given how (relatively) good the rest of the frame etc looks. The KDSS valves for example were not bad to loosen.