Suspension bushings

[Crusty old shellback]

So I have a 2021 Power Wagon.
I now have 110K miles on it.
I was runnin the Thuren tuned Fox shocks. After about 30K plus miles, I started getting the rocking boat effect.
If you've read my build thread, you know what I went thru trying to rebuild them.
So I replaced them with a set of Bilstein 5100 series shocks and that seemed to fix the problem for the most part.

I finally got the Fox shocks rebuilt and installed them. Only difference is I used 7wt oil vice 5 wt that was in them originally. Maybe a little difference, but didn't think it would make much of a difference.
So after several trips to town with the rebuilt shocks, I have the rocking boat effect again, a little worse than before.

So wondering if maybe the suspension arm bushings might be wore out? If so, how do I check?
Or could it just be the valveing shims in the shocks are wore out?

Gonna order some 5 wt oil and was thinking of ordering the shims too.

Getting ready for a road trip next week, so gonna put the Bilstein shocks back in for the trip .

 

[G Mcpherson]

Maybe Message Don at Thuren. He might be able to give you some more information regarding the Oil wt. or Shims.

 

[dieselscout80]

I would take the load off the suspension and then take a pry bar and see if the joint bushings have lots of movement in them.

 

[Crusty old shellback]

Sent Thuren a message.

 

[Crusty old shellback]

Got a reply back from Thuren.
Like me, they say the thicker oil should stiffen up the shocks some.
They are as miffed as I am as to why it rocks.

When I get back from my trip, and it warms up, I'll do a close inspection of the bushings. Also thinking of ordering new shim stacks as well.