Here is my problem-
https://www.cobaltss.net/forums/suspension-67/eibach-sportlines-help-131789/

Now my question is could I have damaged the CV joint by not supporting the lower control arm while doing the install. Which could be causing the vibration I am having.
Anyone???

 

how severe is the vibration. i get a slight vibration in 1st and 2nd gear but that is called axle bind and is normal when you lower a car because you are changing the suspension geometry

 

Its pretty severe. Its like a shutter at about 20mph and it speeds up as my car speeds up. When your stuck in traffic and cruising at 20mph it feels like something is wobbling back and forth. As I said in my other thread I did a good bit of reading last night here and found that folks were talkign alot about supporting the lower control arm while doing springs. The only thing I can think of is cv axles. It seems to get worse as I make a left turn and then roll into the throttle which loads the right front drive and suspenion assembly.
Im still planing on jacking up the car under the control arms to load the suspenion and get the wheels off the ground then start the car and get it up to bout 20mph to see what might be vibrating.

 

when i had my car aligned after my spring install i fell out of alignment in about 6 hrs.... went bak and they redid it for free. everyone makes mistakes, i wouldn't be surprised if ur camber is still off.

 

Well let me say, since I dont think I have mentioned. The steering wheel dosnt shake, nor vibrate up and down. When you feel this vibration at 20mph and as it speeds up you just feel it in the front of the car. I know its somthing that is rotating wether it be a cv axle, joint and that is controled by throttle input.
Im just wondering if the cv joint or joints some how became seperated with in the boots enough during the spring install due to us not supporting the lower control arm. And with all them times we took it apart checking to see what could be causeing the problem. It hasnt gotten worse with all the times we did that but hasnt gottne any better.
I have read the thread on here about aligning the top plate and tab making sure it is pointing inwards.
At this 20mph vibration I dont hear any noises nor as the car speeds up.
I guess if I can see if the axle or joints are vibrating if I should rush out and replace them.

 

you can slide the protective boot off and actually watch the cv joints. not a good idea for cruising, it'd be ok only for being on the jacks, and for a small period of time seeing as the boot not only protects from the elements, but it seals the grease around the cv joint.

and be careful when u get that car up to 20 on the jack stands... if there is ANY imperfections in your tire balancing, or if the vibration does infact affect the power delivery to the wheels, you could sway the car enough for it to fall off the jack stands. i guess just make sure ur set up properly =P

sounds like a real pesky problem. btw, 20mph regardless of gear, right? i suppose u could be @ 4k rpm in 1st, ~2k in 2nd and about 1.5k in 3rd... it doesn't matter? in which case engine load is not a factor, allowing you to pinpoint the suspension as the probable cause? just checking.

when you do your reinstall, just do everything uber slow as to completely rule out your install. good luck buddy

 

Well did all that I said I was gonna do and found nothing. Even replaced the left side hub and bearing, since it had the same amount of mileage as the right and the right was bad.
My buddy and I are thinking its an alignment issue. Now after the spring install is when I noticed the vibration and the fallowing weekend I got an alignment. BUT they did a shity job. Wheel is at 1 o'clock to drive straight and if you let go of the wheel the car drifts to the left. I went back the next day and argued my point that I know how to alignments and did them for about 5yrs. The tech stated that where it is now set wont wear tires even tho the wheel is of center. Well after arguing for a while they gave me my 80+ bucks back. I have since noticed that the outside edges of both front tires are beginning to get a feathered edge, I also took a closer look at the alignment sheet and noticed that the dumb ass tech entered the wrong vehicle. He entered a 06 balt NON SS/SC. Which we all know even without the sportlines the SS/SC sits lower from the factory than other models. SO what ever spec's he was using wasnt correct.
This Sat Im hoping to bring it to another shop fo an alignment. Another friend has gone this other one and has never had a problem.
Thinking this is an alignment issue is due to the feathered edges. If there is to much + toe (toe in) it can cause a vibration. The tire is skipping as it rolls. So Im hoping that this next alignment will do the trick. But now that the tires are feathered Ill still have a slight vibration from that. Guess Ill have a reason to get my new tires. 225/40/18's.
Ill keep ya'll posted.

 

i hate it when techs don't know wtf they're doing. get them tires aligned. and so you did put the stock springs back in?? or no?

how much tread is left? hit the indicators at all? it's been a week or 2 you'll be fine, once the tires are aligned just rotate em. good luck man

 

There is plenty of tread left and I kept the Sportlines in the car. I like them to much. The guy Im bringing it to on Sat has done my buddys GTO and he swears by him. Always get a good alignment.
Thanks for all your input.

 

If when you press the clutch in at 20mph the vibration goes away its highly unlikely that its the CV or a poor alignment is causing the vibration, because the CV will still be spinning at 20mph regardless of the clutch beign depressed or not and so will the wheel, and wheel vibration from imbalance or any other cause only cars about speed, not clutch engagement, if its truly road speed(mph) related it will make the vibration even with the trans in neutral or the engine OFF) Do you have to push the clutch to make the vibration go away? meaning if you were to be going 25 mph and you coasted down to 20mph in gear will it still vibrate. Does it make the vibration at 20mph only when your in gear with the power on? what does it do if your just "floating" along? is it the same at 20mph regardless of the gear you are in(will it vibrate the same at 20mph in 2nd as it does at 20mph in 3rd?)

 

As I said in my previus post to yours, I know feel that it is an alignment issue. We loaded the front suspention by jacking up the car from under the lower control arms to compress the front struts and load the front end. and then started up the car and brought the wheel speed up to 20mph. There was no vibration. Visual or felt. Did this in first and second gear and nothing.
As I said in the other post, I had gotten an alignment after the spring install, but the tech used the wrong car spec's (06 balt NON SS/SC). The SS/SC sits 25mm lower stock than other models. So any alignment spec's used other ss/sc wont work. The geometry is different.
Now that I have the sportlines on the car the geometry is realy different, and when we had the car apart last week we noticed that the ouside edges of both front tires are becoming feathered. Meaning the toe is out. How badly out I will find out this sat when I get another alignment. I know that if there is excessive toe in or toe out it will cause a vibration.
The vibration comes on at 20mph each and every time and then as the car speeds up so does the vibration. As far as pushing in on the clutch and not feeling it, I have to now say I might have been wrong about that statment. I can leave for work in the morning and coast thru my parking lot and reach 20mph and feel the vibration coming on. Now when under power it is more obvious and when making left hand turns it is as well. I feel it mostly on the right front wheel. the steering wheel dosnt shake back and forth but you feel the front end of the car shake.
Guess I will see what happends the Sat with the new alignment.

 

Well after further review, the vibration problem is still there and not a problem with the alignment. Its something in the drive line. As I was stuck in traffic going down a hill today, I put the car into first gear and got up to the vibration speed 20mph, then I took the car out of gear and there was no vibration as I continued to coast down the hill. reached a coasting speed of 35mph and still nothing. So I defiantly feel its some where in the drive line. But not the axles. cause if it were they would be vibration even during the coast down hill.
I AM installing the stock springs on Sunday and I hope the vibration will go away. If its still there then Im still under warranty (33k on the clock now) Ill bring it to the dealer.
I wish I had a clue what it could be. Im getting to old for this ****.

Hey read my most recent post. Its drivline related.