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Pop/Clunk Sound

This is a discussion on Pop/Clunk Sound within the Brakes/Suspension/Chassis forums, part of the W Body Tech category; Help me figure this out as its starting to bug me. Car was acting fine until I had 1 friend ...


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Old 09-30-2008, 03:59 PM
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Default Pop/Clunk Sound

Help me figure this out as its starting to bug me.

Car was acting fine until I had 1 friend in my car and we took a really harder corner at about 80-100% power. Most of you don't do this since you dont have a Torsen diff but I do so I'm a quite a bit harder on my car.

Car has 75k on it and has been maintained very well. I have all new moog ball joints, Moog Inner and outer tie rods, KYB AGX struts, Gabriel/Montroe strut mounts, Napa replacement cv shaft drivers side, New Wheel hubs with ARP Studs, All new bushings pressed in Control arms, GMPP springs, GMPP sway Bar, and GMP strut bar.


That was all done in the last 1 and say 15k miles. It never caused a clunking side before until I lowered my crade and rebuilt my trans. I reinstalled it and have the cradle not completely aligned perfectly but pretty close. It only clunks when I come out of the hole kind of fast around a corner (particularly turning left), and like 95% only happens on the left side. I think it may have done it once or twice on the drivers side. I tightened the say bar down really tight as well as the sway bar endlinks I tightened more as well.

I'm kind of stumped what it could be exactly. It clunks pretty good and you could probably feel it in the floor.

What is under extreme stress when taking a left hand turn.

Sway Bar (yes)
Passenger CV shaft (yes)
Strut mount not really


It ocasionally pops when I back out when I have the tires cranked all the way (quiet)


I ended up realigning my cradle last weekend again, but the manual was off on my cradle alignment bolt that I needed. I picked up 2 3/4 bolts to align the passenger side of the cradle. The front one uses a 3/4 bolt while the rear on mine I think is either 3/8 or 1/2. I got it pretty close but definitely not perfect as I can see the hole is off by about 1/16-1/8. I torqued them down to 135 lb/ft and started with the passenger side as that is recommended. Since I've done that, the popping doesn't happen near as often, but it still does.

I'm half tempted to drop the cradle in a few weeks and press in new bushing as well as properly aligning it right. Does the top of the bushing hats causing a popping sound if the cradle moves slightly?
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