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Old 09-18-2021, 06:07 PM #1
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Still squeaking after suspension refresh

My 2007 4WD had been clunking and squeaking when I would roll over a bump or hit a dip in the road.

But now that I have replaced both front upper and lower control arms, and front/rear shocks, it is still clunking!

Any idea what to check for next??

Only thing I can think of is sway bar bushings.


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Old 09-18-2021, 06:23 PM #2
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I mean you have both sway bars, 4 end links, tie rods, pan hard bar, and 4 links still to verify at least.

On my icon setup I just found out that the rear springs are squeaking on the upper rubber bump stop, been driving me nuts, I thought it was my custom links and heim joints but nope..


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Old 09-18-2021, 06:40 PM #3
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Definitely look/replace the sway bar bushings where it mounts to the frame. Any looseness there will give an odd thunk with certain bumps. When the control arms were installed were the frame bolts tightened with depressed shocks? They should be tightened when the car is at it's normal resting position.
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Old 09-18-2021, 07:02 PM #4
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Quote:
Originally Posted by MikeinNH67 View Post
Definitely look/replace the sway bar bushings where it mounts to the frame. Any looseness there will give an odd thunk with certain bumps. When the control arms were installed were the frame bolts tightened with depressed shocks? They should be tightened when the car is at it's normal resting position.

Thanks, it actually is more of a thunk soundÖ and itís not every bump, but more of the big ones.

Come to think of it, we may have tightened the arms in without load on the suspensionÖ.

If thatís the case, how would you fix that? Undo and retighten under load?


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Old 09-18-2021, 07:19 PM #5
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Quote:
Originally Posted by aemravan View Post
I mean you have both sway bars, 4 end links, tie rods, pan hard bar, and 4 links still to verify at least.

On my icon setup I just found out that the rear springs are squeaking on the upper rubber bump stop, been driving me nuts, I thought it was my custom links and heim joints but nope..


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Much appreciated. Iím a novice at this stuff, so not real sure what all could produce such a noise lol

I believe I have at least isolated the thunk to the front Ö probably driver side


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Old 09-18-2021, 07:43 PM #6
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The sway bar is a well known and documented noisy point on these trucks, specifically the front..
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Old 09-18-2021, 09:17 PM #7
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Quote:
Originally Posted by Billynath1988 View Post
The sway bar is a well known and documented noisy point on these trucks, specifically the front..

Is typically the bushings or can it be the bar itself making the clunk?


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Old 09-18-2021, 10:02 PM #8
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Quote:
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Is typically the bushings or can it be the bar itself making the clunk?


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If you hit a driveway approach straight on, and both wheels move together and there's no clunk, it's very likely the sway bar.

If it clunks when one wheel goes up the approach first (articulating one wheel independently) and it clunks, it's absolutely the sway bar.
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Old 09-18-2021, 10:04 PM #9
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Quote:
Originally Posted by Keros View Post
If you hit a driveway approach straight on, and both wheels move together and there's no clunk, it's very likely the sway bar.

If it clunks when one wheel goes up the approach first (articulating one wheel independently) and it clunks, it's absolutely the sway bar.

Interesting. Iíll have to pay close attention to that. From what I have noticed, it seems to clunk more on the one wheel approach l. Definitely seems to favor the driver side.


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Old 09-18-2021, 11:10 PM #10
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Found some pics of the sway bar I took a while back. I wasnít paying too much attention at the time, but itís looking pretty rough. Even seeing some cracks on one side. I guess I need to start looking for a new one. I just ordered some Energy suspension bushings too.


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Old 09-19-2021, 11:18 AM #11
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the "cracks" are just the paint coating, not the bar itself. you most likely dont need a new bar, just install the new bushings & see if they fix or improve the clunk & go from there.
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Old 09-19-2021, 12:21 PM #12
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Quote:
Originally Posted by Toystory2 View Post
Is typically the bushings or can it be the bar itself making the clunk?


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Its the bushings and endlinks..
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Old 09-19-2021, 01:07 PM #13
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Quote:
Originally Posted by firebirdguy View Post
the "cracks" are just the paint coating, not the bar itself. you most likely dont need a new bar, just install the new bushings & see if they fix or improve the clunk & go from there.
Thatís good news, although I may just give it some kind of rustoleum paint while Iím at it.
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Old 09-19-2021, 02:28 PM #14
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If the bar is actually cracked, it will break at some point very soon. So I wouldn't worry about replacing it, it'll let you know.

The clunk is the steel bar being able to move back and forth. Normally, it's held rigidly and only able to rotate as the suspension moves up and down... doing it's job of being a linear spring. Once some play is available in the bushings it bangs around in there.

There's a huge amount of force involved in the sway bar system. I generally kill a set every couple of years. Speaking of which, mine need replaced too.
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Old 09-19-2021, 04:58 PM #15
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Quote:
Originally Posted by Keros View Post
If the bar is actually cracked, it will break at some point very soon. So I wouldn't worry about replacing it, it'll let you know.

The clunk is the steel bar being able to move back and forth. Normally, it's held rigidly and only able to rotate as the suspension moves up and down... doing it's job of being a linear spring. Once some play is available in the bushings it bangs around in there.

There's a huge amount of force involved in the sway bar system. I generally kill a set every couple of years. Speaking of which, mine need replaced too.

Thatís interesting. I didnít suspect the sway bar initially because I didnít think it would generate that loud of a clank. I just ordered new bushings, so Iíll take it off and give it a good check when I put those on. If it still squeaks, I guess the sway bar links are next.


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