Rear Suspension Squeak

[tbone63]

I have a nasty squeak in my rear suspension that comes and goes. It always goes away when it's raining out. I suspect shock bolts or maybe control arm bolts could use some grease. I fogged the crap out of everything with WD40 but still there. Has anyone found one thing that seems to be the culprit so i can save some time monkeying around with it? It's literally driving me insane.
Thanks in advance.

 

[tbone63]

I also installed Air Lift 5000 bags last year but it only squeaks in the last month or so.

 

[tbone63]

Anyone?

 

[Wild one]

Anyone?

Check the isolater on the top of the rear springs

 

[tbone63]

Check the isolater on the top of the rear springs

What would I check on them? That it is dislodged?

 

[Wild one]

What would I check on them? That it is dislodged?

They have been know to wear out ,and then the top of the spring will have a metal to metal contact point,which can lead to an annoying squeak.Ran into on a buddies truck a few years back,took awhile to find it. The best way to look them over is to pull the rear springs out,so you can check the rubber isolater over close on the top of the spring. Not saying it's your issue,but if you've checked everything else over,and still have noise,it's another place to look.