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2005 Cadillac CTS-V
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971 Posts
Discussion Starter #1
I still have noises coming from what sounds like the GC kit. I just got back from lifting the car up and without any weight on the suspension I can grab the spring and move it back and forth REALLY easy. I may be wrong, but it seems to me like that when I go over bumps, brake, let off brake that the spring MAY move and make these noises. Cause it is just metal to metal. Maybe I need to do some adjusting? I have the Nitto 255/45/18's on it. It is 27.5" in the rear and like 26-7/8" in the front. I have the spacers on the rear. If anybody can help, it would be much appreciated. Leaving in the morning for Indiana and I would love not to listen to that all the way there. Thanks.
 

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ZIP
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51,864 Posts
The springs are suppose to be easily moved in their perch with the suspension unloaded. That's not the cause of your noise. You'll need to give us a refresher of what noises you're getting with the GC...
 

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2005 Cadillac CTS-V
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971 Posts
Discussion Starter #3
Over bumps and at a start and stop, it sounds like a clunk. I have that RMD bar on and all that looks really tight. I just put the spacer in today with the rubber washer. It still makes noise. I'm driving around with the entire back seat out. It's not gremlins I swear. My buddy was in the back seat the other night and he was like what is that noise?
 

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51,864 Posts
What is the RMD bar? A rear strut tower brace? I used 2 Feff spec'd spacers per side.
 

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2016 ATS Premium 6-spd MT
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14,075 Posts
Sometimes when you jack the car up, a rear spring will not seat properly in the perch when you lower it back down. When you then drive off and go over any small bump, that spring will reseat in the perch with a BAM !!! Scared the crap out of me the first time it happened.
 

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Banned
05 CTS-V
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889 Posts
double check the center shock bolt at the top... mine came off when driving 3 days after install (talking rear here) and made a huge bang.. but if you are getting noises i'd say you need to add the spacers in the like feffman found out for us... i have ZERO issues with my GC and i love it.. (except for the front squeeking, even with the $33 bearing per side in the front BIGGEST WASTE OF MONEY!!!)
 

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2005 Platinum CTS V-Headers+3in pipes
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3,012 Posts
The more i read about the GC kit the less i want to take the plunge..so many mixed results

Has anyone installed the GC kit and retained the stock ride noise quality?(minus, those creaky ass TSB Spacers, now those were a waste of time) I just keep on hearing about bad results from this route and prolonged mod hell..
 

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51,864 Posts
The more i read about the GC kit the less i want to take the plunge..so many mixed results

Has anyone installed the GC kit and retained the stock ride noise quality?(minus, those creaky ass TSB Spacers, now those were a waste of time) I just keep on hearing about bad results from this route and prolonged mod hell..
The only issue I had was a squeaky driver's side bump stop. A bit of greasing a few times over a few months and I don't hear it anymore. Other than that, I've been very happy with the GC...
 

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Registered
2004 CTS-V
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1,627 Posts
The more i read about the GC kit the less i want to take the plunge..so many mixed results

Has anyone installed the GC kit and retained the stock ride noise quality?(minus, those creaky ass TSB Spacers, now those were a waste of time) I just keep on hearing about bad results from this route and prolonged mod hell..
Honestly, in my opinion, the huge increase in handling and the adjustability of the GC Kit makes even the clunking worth it. And the price is so reasonable you can't go wrong with the kit. Just try the kit and if the clunking over bumps really bugs you then do the Feffman fix and be done with it. I have had my kit on for 3 years and have not had any problems other than clunking which I have gotten used to.
 

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2016 ATS Premium 6-spd MT
Joined
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14,075 Posts
The more i read about the GC kit the less i want to take the plunge..so many mixed results

Has anyone installed the GC kit and retained the stock ride noise quality?(minus, those creaky ass TSB Spacers, now those were a waste of time) I just keep on hearing about bad results from this route and prolonged mod hell..
I agree with tbjs and tweeter. The ride is firmer but not at all harsh. Add the Feffman Fix, then sit back and enjoy how much better the car looks, too.
 

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Premium Member
2005 CTS-V
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8,363 Posts
I am still on the fence about Ground Control because I will need a new set of shocks at the same time.

Whether I get replacement FG2s, QA1s or anything else + Ground Control, + the other bits & pieces required to make GC quiet I get a cost roughly equal to a set of KW Coilovers that reportedly have no issues.

Therein lies the conumdrum.
 

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'05 LS6 V Stealth Grey; '14 Z71 SLT Sierra 1500 Stealth Grey
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2,821 Posts
What exactly is the Feffman fix? Are they the bearings for the fronts? I am in need of a suspension overhaul. I really don't want to go into another mod hell as my sway bars are my nemisis right now.
 

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Premium Member
2005 CTS-V
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8,363 Posts

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Banned
05 CTS-V
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889 Posts
The bearings dont work! it still squeeks.. i bought the $33 each bearing and it squeeks, but to all on the fence... jump on over! do the Feffman fix in the back and the back will be fine... in the front if you want to do the bearings dont get the sealed ones for $66 just do unsealed ones... i can get 2 of them for about $25 lol...

as we all can see some people cant stand a click of creek, where i will deal with a fcking squeek for the great handling.... PUSH THE THROTTLE DOWN AND YOU WONT HEAR THE SQUEEK!!! lol
 

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Registered
2005 Cadillac CTS-V
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971 Posts
Discussion Starter #16
Well. I raised the ride height (now it looks raked out)HA. I took the strut bar out. Tighten all of it back down. Made sure to smash the center pillow with tightening of the center nut. AND I STILL HAVE THE NOISE. It's killin me. I don't know where else to look. Maybe I got a bad fg2. They were brand new? Can I throw on my original shocks and test? Are there any bushings back there that could be bad?
 

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Banned
05 CTS-V
Joined
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889 Posts
Well. I raised the ride height (now it looks raked out)HA. I took the strut bar out. Tighten all of it back down. Made sure to smash the center pillow with tightening of the center nut. AND I STILL HAVE THE NOISE. It's killin me. I don't know where else to look. Maybe I got a bad fg2. They were brand new? Can I throw on my original shocks and test? Are there any bushings back there that could be bad?
did you add the feffman fix spacers? and for the note i didnt super tighten the pillow and i have zero issues...
 

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Registered
2005 Cadillac CTS-V
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971 Posts
Discussion Starter #18
Did fhe feff fix (made noise). Did the spacers (made noise).
 

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Registered
2005 Cadillac CTS-V
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971 Posts
Discussion Starter #20
Does anybody know the outside and inside diameter of the adjuster ring in the rear? Thinking about putting a rubber bushing right there.
 
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