Need help on suspension fix

[OLEJOE]

‍ IDK but I keep hoping it gets figured out. It seems to help some if I have weight in the back of the cab but I don’t know if it’s helping to hold the cab down or loading the frame of the truck in that area. I’ve put weight in the bed from one end to the other and there’s no significant change.

 

[H3LZSN1P3R]

It's interesting that both trucks we are discussing are longer wheelbase trucks, which should make it ride smoother if anything.

Also both trucks are 2022 models. I wonder if there was a production line issue that hasn't come to light yet?

Also interesting it seems both are not OEM suspension also gassers

 

[OLEJOE]

Also interesting it seems both are not OEM suspension also gassers

Mine is OEM. The factory Off Road Package.

 

[Rockcrawlindude]

It's interesting that both trucks we are discussing are longer wheelbase trucks, which should make it ride smoother if anything.

Also both trucks are 2022 models. I wonder if there was a production line issue that hasn't come to light yet?

Is this true both are gas CCLB? Both 2500? We may be getting somewhere.

I think we determined that the CCLB gassers do NOT have the extra shock on top of the diff while all the other gassers DO have it. AEV refers to this as “anti-power hop” in their literature

@LateToTheParty am I remembering this correctly?

 

[Rockcrawlindude]

I’ve driven a lot of pickups in my 51 years of having a license. And I have driven some real junkers and some very nice rides. What I’m trying to describe about my truck is not normal. It’s kinda hard to put in to words but it feels like something loose or flexing. I traded an 18’ ccsb CTD that rode a lot better than the 22’ does. Dealer wouldn’t even try to figure it out and said that’s how they are. Maybe it’s just the combination of softer springs and/or the Bilstiens. IDK

No disrespect aimed your way, sir. We’re all in this together

 

[OLEJOE]

T

Is this true both are gas CCLB? Both 2500? We may be getting somewhere.

I think we determined that the CCLB gassers do NOT have the extra shock on top of the diff while all the other gassers DO have it.

@LateToTheParty am I remembering this correctly?View attachment 44265

That would be correct. Mine doesn’t have the extra shock and has the 2 piece driveshaft with the swing bearing.

 

[UglyViking]

Is this true both are gas CCLB? Both 2500? We may be getting somewhere.

I think we determined that the CCLB gassers do NOT have the extra shock on top of the diff while all the other gassers DO have it. AEV refers to this as “anti-power hop” in their literature

@LateToTheParty am I remembering this correctly?

Both are longer wheelbase, but one is a CCLB and the other is a MCSB. Both being longer than the CCSB trucks + that center shock may have an issue?

I couldn't find the instructions for the Carli coils but the Thuren coils mention disconnecting the pumpkin mounted shock for easier install, but it doesn't make a note of it needing to stay removed.

 

[ClawSS]

Maybe a description is like the impact tremors you saw in Jurassic Park. Sometimes I can't see the bump in the road, but I feel the bump for about 2-3 ripples. Big whoops just glide over as I'd expect the springs/shocks to react.

 

[LateToTheParty]

Is this true both are gas CCLB? Both 2500? We may be getting somewhere.

I think we determined that the CCLB gassers do NOT have the extra shock on top of the diff while all the other gassers DO have it. AEV refers to this as “anti-power hop” in their literature

@LateToTheParty am I remembering this correctly?View attachment 44265

Yep. Correct, CCLB's don't have the provisioning to add it. I do know that I upgraded that shock on my 4th Gen CCSB and took out a bit of the skipping on washboard roads and such.

 

[OLEJOE]

Maybe a description is like the impact tremors you saw in Jurassic Park. Sometimes I can't see the bump in the road, but I feel the bump for about 2-3 ripples. Big whoops just glide over as I'd expect the springs/shocks to react.

That’s exactly how mine is. I found I could bump the front part of the rear driveshaft with my hand and simulate the same type of rebounding vibration. You wouldn’t think you would even be able to raise the transmission, transfer case and the engine that easily but it moves a good bit.

 

[OLEJOE]

Let me clarify what I said. The front part of the rear driveshaft between the transfer case and the swing bearing.

 

[ClawSS]

My rear trackbar has been delivered...now to get about an hour to install it before I go on a 600mi. vacation to NC & SC. That should shake it up a bit and see how it "helps".

I will be unloaded for the whole of the driving trip and then begin to get myself loaded once I get to my destination.

 

[Rockcrawlindude]

That’s exactly how mine is. I found I could bump the front part of the rear driveshaft with my hand and simulate the same type of rebounding vibration. You wouldn’t think you would even be able to raise the transmission, transfer case and the engine that easily but it moves a good bit.

I have a floor shift t-case and when I get into the fuel, the shifter moves 1-2” normally. That stuff moves around quite a bit. I wouldn’t think that carrier bearing should have any play, though. I have a 1 piece shaft so I can’t help there.

 

[OLEJOE]

I have a floor shift t-case and when I get into the fuel, the shifter moves 1-2” normally. That stuff moves around quite a bit.

Mine is manual shift also. The shifter shakes when it does the jitters.
I got some of it out by putting a rubber block between the tc mount and the cross member it’s all supported by.

 

[jetrinka]

Mine is manual shift also. The shifter shakes when it does the jitters.
I got some of it out by putting a rubber block between the tc mount and the cross member it’s all supported by.

To be clear, the jitters you feel happen when traveling down the road? Its not just unsettled when coming to a stop?

 

[OLEJOE]

Correct. When going down the road. It’s like if you hit a small bump in the road and then you feel it 3 or 4 more times with it decreasing in intensity until you hit the next one. It rides fine if it’s a rough place that’s long enough to kinda cancel itself out.
It’s like a harmonic vibration.

 

[jetrinka]

I suppose I experience that once in a while in my truck too. I tend to notice it a lower speeds (under 20) if say the truck goes off of a short "ledge" in the road where the suspension travels down and then recovers. I would describe it almost like the bounce you would get if you sat on a very strong spring - experiencing it settling at the very top of its travel.

Its never really bothered me though. It sounds like your experience may be worse.

For reference my truck has the electronic t-case shift (so no visual of drivetrain movement) and it also has the 3rd shock above the rear differential. Solid one piece driveshaft CCSB truck.

If I had to guess its almost like the shocks are not dampening the springs well at the very top of their travel.

 

[ClawSS]

If I had to guess its almost like the shocks are not dampening the springs well at the very top of their travel.

^^^This! And I have the Fox IFP 2.0s from my Thuren kit installed front and rear (rear set matched for the Thuren springs).

 

[UglyViking]

I hope this doesn't come off as offensive, but you have the shocks in their correct placement right? (front up front, etc.)

Has Thuren offered any feedback?

@OLEJOE what brand and model tires are you running?

 

[OLEJOE]

I hope this doesn't come off as offensive, but you have the shocks in their correct placement right? (front up front, etc.)

Has Thuren offered any feedback?

@OLEJOE what brand and model tires are you running?

I have the infamous Firestone AT’s 275/70R-18. 40lbs. in the front and 30 lbs of air in the rear. Air pressure doesn’t seem to affect the jitters. I also have a total of 8900 miles on my truck.