I have a 06 ss/sc that I've just replaced the struts and shocks to the le5 also got new strut mounts bearings insulators and got h&r springs, I also got new cv axles lower control arm bushings and new tires. And yet right after the suspension change and the test drive after it is all on I've had this vibration goin on with my car I got the tires rebalanced and the tires rotated and aligned they told me my left rear tire took a bit of weight but it didn't shake till immediately after the change. You can feel it goin through 1 and 2 but when I get to 3 it seem to disappear. It also goes away when I let off the gas peddle when I feel it vibrate. It can't be because the wheel because the vibration stayed the same after the rotation. It's really driving me insane. Sometimes it doesn't vibrate or that I can notice which is weird. Idk what's goin on with this car I keep throwing money into it and yet nothing..

Have you gone through your entire suspension and retorqued everything? I found that one of my endlinks loosened and when we swapped Bankers one of his rear shock bolts had backed out 1.5 turns that created a very annoying vibration.

No I have not gone back through maybe this weekend I'll try that

Yeah, I remember bankers shook bad after he went home and back (roughly 30 miles) because of that rear shock bolt. Make sure to use factory torque specs not "oh its tight" specs.

Haha well I didn't torque any of em I just did the o that's tight. Where would I get the torques at

I know there is a whole list of torque specs on here. Let me look quick.
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This is the one I used...
https://www.yourcobalt.com/forums/pro...apacities.html

Well I took to to chevy and he said it sounds like axle binding so I would I fix that and could axle binding be caused by le5 and h&r springs? I would I fix axle bind because their new axles

Then it would be rotated mounts from either ZZP or Powell (I'd personally choose Powell) and it should be fixed.

Mounts should help, but your new suspension would not be the cause. You can get away with inserts instead of rotated to save on money as long as you have the proper tools, otherwise just replace with rotated.

Idk what inserts are.. And by rotated mounts those are just trans mounts right?