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Rear Brakes FILE COMPLAINT HERE SO WE CAN GET A RECALL

08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

Rear Brakes FILE COMPLAINT HERE SO WE CAN GET A RECALL

Old 12-10-2009, 05:40 PM
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done!
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Old 12-10-2009, 10:07 PM
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The scoring on the rotor could be caused by the ceramic in our brakes?
They're also very hard brakes, I'm sure. Which causes the squeal to be more apparent.
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Old 12-11-2009, 12:36 AM
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i am waiting on the dealer to call me and let me know when my pads and rotors are in. that was last monday. they also said there is a new TSB out on the brakes and there is a mileage cut-off for warranty i believe. i was over it, i think it is 10k miles, but they said they are going to take care of it
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Old 12-11-2009, 12:38 PM
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they should take care of you, especially in the state there in. they cant loose any more loyal GM customers
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Old 12-11-2009, 12:50 PM
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Are brakes FAILING? No? Then it won't be a recall.

You bought a PERFORMANCE-MINDED CAR. With that comes stiff suspension, loud brakes, and exhillirating acceleration.
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Old 12-11-2009, 12:59 PM
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Originally Posted by Illini_06SS View Post
Are brakes FAILING? No? Then it won't be a recall.

You bought a PERFORMANCE-MINDED CAR. With that comes stiff suspension, loud brakes, and exhillirating acceleration.
Lol! My car is too fast and it scares me, even when I lightly apply gas, the low end power is great, this is potentially dangerous. I am going to apply for a recall.
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Old 12-11-2009, 08:52 PM
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but the issue is the wearing of the brake pads. you shouldn't go thru rear pads before fronts on any type of car. and i know brake pads are a wearable item, but not at 10,000 miles
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Old 12-11-2009, 08:57 PM
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Originally Posted by Billdayton View Post
I'm going with a third choice - GM did not lubricate the sliding pins on the calipers, causing the pads to bind, instead of releasing. Remember, the SS is the only Cobalt with rear disc brakes. However, I'm just a Chemist, not an automotive engineer. Obviously, GM did something wrong.

Bill Dayton
09 Cobalt SS, rotors turned at 4600, pads & rotors replaced with proper lubrication at 8000, looks good at 9500.
not true, and im almost certain that we have the same rear brakes, why no problems on ss/na cars, even my friends ss/sc had rear brake rotor problems
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Old 12-11-2009, 09:08 PM
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Originally Posted by glen229 View Post
not true, and im almost certain that we have the same rear brakes, why no problems on ss/na cars, even my friends ss/sc had rear brake rotor problems
All I know is that I had rotors turned at 4600 miles, and pads & rotors replaced & slide pins lubed at 8000 miles. I now have 11500 miles, and essentially no wear on the rears.

Bill Dayton
95 Corvette - brakes wear forever
09 Cobalt SS
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Old 12-11-2009, 09:10 PM
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yeah, i wonder why it would cause an issue if its the same brakes put on in the same manor
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Old 12-11-2009, 09:56 PM
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Originally Posted by glen229 View Post
yeah, i wonder why it would cause an issue if its the same brakes put on in the same manor
Well, is it the same brakes put on in the same manner? The TC got front Brembos, I bet they changed the rear brakes, too.

My warranty rear brake paperwork included "lube caliper pins & slides". That's kind of unusual to list with a brake job, unless it is an issue.

Bill Dayton
95 Corvette, 09 Cobalt SS
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Old 12-11-2009, 11:39 PM
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I've got about 3k on my rear brakes since they were replaced and they still look new. Mine didn't wear unevenly though. They just grooved real bad on the inside.
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Old 12-14-2009, 10:23 PM
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i just bought my car and its doing this. DONE
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Old 12-14-2009, 11:27 PM
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Some idiot tried to do something similar on the speed 3 forums. Get It fixed under warranty Whig has been done for many even at 10k miles or get new pads/rotors. It's less than $100 for all that and you are trying to get a recall? Hahahahaha won't happen.
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Old 12-30-2009, 03:35 PM
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My '09 SS/TC (7,500 miles) goes in for state inspection/emissions on Jan 4th, so today I decided to take another look at the rear brakes (fronts are in great shape).

Well, the inside of the rear brake rotor is grooved deeply from the brake caliper coming in contact with it. Outside of the rotor is fine.

Is this because the caliper pins/slides need to be lubed, or is it simply because the brake caliper was cast wrong? There is a 'knob' on the caliper(at the top/inside) that is digging into the rotor. If I would grind this off it would allow the brake pad to do its job, and would have no adverse affects on the caliper itself.

I'm anxious to see how my Chevy dealer is going to take care of this. I fully expect it to be covered under the 3/36, including new rotors.
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Old 12-30-2009, 03:58 PM
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Originally Posted by Hamrhead View Post
My '09 SS/TC (7,500 miles) goes in for state inspection/emissions on Jan 4th, so today I decided to take another look at the rear brakes (fronts are in great shape).

Well, the inside of the rear brake rotor is grooved deeply from the brake caliper coming in contact with it. Outside of the rotor is fine.

Is this because the caliper pins/slides need to be lubed, or is it simply because the brake caliper was cast wrong? There is a 'knob' on the caliper(at the top/inside) that is digging into the rotor. If I would grind this off it would allow the brake pad to do its job, and would have no adverse affects on the caliper itself.

I'm anxious to see how my Chevy dealer is going to take care of this. I fully expect it to be covered under the 3/36, including new rotors.
There are a lot of opinions about this problem. I had my rear rotors turned at 4600 miles, and the groove came back. I got new pads and rotors, and slide pins lubed at 8000 miles. Now at 12000 miles, there is no wear showing, just the original machine marks on the rotor, inside and out.

My opinion is that they failed to lube the pins.

Whatever, make a complaint to the DOT! Last time I looked, there were a little over 100 complaints on this for the 08 & 09 Cobalt SS. Even if your dealer handles it under warranty, many don't, and the DOT needs to know the extent of the problem.

Bill Dayton
2009 Cobalt SS, Victory Red, G85, RPG
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Old 12-30-2009, 05:58 PM
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Complaint Submitted
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Old 01-01-2010, 04:59 PM
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sent....I hope GM will do somthing about this..
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Old 01-01-2010, 09:34 PM
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I just had to replace my rear rotors and brakes. I had less than 20,000 miles on my car. The oddest thing was that I had just had my brakes inspected at my last oil change which was a little less than 3,000 miles ago and at that time there were no problems. So in less than 3,000 miles my rear pads wore down all the way and did enough damage to destroy the rotors. I am calling in my complaint first thing on monday.
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Old 01-03-2010, 01:39 PM
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Thumbs down

At close to 1500 miles I lost an oil pressure sensor, I could see the scoring on the outside of the rotors, at 2500 the chrome came off of the door handle on the driver side, and the shift boot came apart, at three thousand I lost a tranny, and at 5500 the chrome came off of the other door handle and the brakes are squealing like no ones business and had the valve cover seal replaced because it was leaking. my car has spent more than a month total in the f***ing shop over the last year. I am not very happy. I have brought it in three times for the damn brake issue, and each time they gave me the **** about the "high performance" brakes, well let me tell you something, one, there is nothing "high performance" single piston brakes. and two I worked at the damn stealership into which I take the damn car! And to think I took delivery of my car in july of 09
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Old 01-03-2010, 02:05 PM
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Originally Posted by 208REV View Post
At close to 1500 miles I lost an oil pressure sensor, I could see the scoring on the outside of the rotors, at 2500 the chrome came off of the door handle on the driver side, and the shift boot came apart, at three thousand I lost a tranny, and at 5500 the chrome came off of the other door handle and the brakes are squealing like no ones business and had the valve cover seal replaced because it was leaking. my car has spent more than a month total in the f***ing shop over the last year. I am not very happy. I have brought it in three times for the damn brake issue, and each time they gave me the **** about the "high performance" brakes, well let me tell you something, one, there is nothing "high performance" single piston brakes. and two I worked at the damn stealership into which I take the damn car! And to think I took delivery of my car in july of 09
Speaking of high performance brakes, I bet they don't have this problem with Corvettes! My 2 Corvettes have been easy on brakes, and I tend to drive them hard. I bet when you finally get them worked on there is no lube on the caliper slide pins, causing pads to bind.

I finally got my brakes fixed right at 8000 miles, and at 12000 miles, the rotors still show the machining marks.

Bill Dayton
95 Corvette, 09 Cobalt SS Victory Red
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Old 01-07-2010, 06:30 AM
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complaint sent
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Old 01-07-2010, 10:28 AM
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My dealership put new rear calipers, rotors and pads 1000km ago...

The rotors are now scored like hell, and it seems to be binding again... after 1000km.

Very good design GM
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Old 01-07-2010, 10:51 AM
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Originally Posted by Sn0wblade View Post
My dealership put new rear calipers, rotors and pads 1000km ago...

The rotors are now scored like hell, and it seems to be binding again... after 1000km.

Very good design GM
Did the paperwork indicate that they lubed the caliper slide pins?

I had my pads & rotors replaced and slide pins lubed at 8000 miles. Now at 12000 miles, the rotors still look new. The shop manager did say the parts numbers were changed, so maybe that is significant.

Bill Dayton
95 Corvette (FS), 09 Cobalt SS
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Old 01-07-2010, 10:54 AM
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Originally Posted by Billdayton View Post
Did the paperwork indicate that they lubed the caliper slide pins?

I had my pads & rotors replaced and slide pins lubed at 8000 miles. Now at 12000 miles, the rotors still look new. The shop manager did say the parts numbers were changed, so maybe that is significant.

Bill Dayton
95 Corvette (FS), 09 Cobalt SS
Exactly, lubricating the sliders is the most important step. Mine were bone dry, always had been, I just waited for them to bind so it was on my account under GMVIS once they were bound. Dealership machined the rotors, lubricated the sliders, bolts etc. and everything looks much better now than it did before.

Thankfully this happened before my inbound pad was hosed, I still have 7mm inside and 7mm outside on both rears . That said, I still think GM needs to answer to why they are NOT greasing these from the factory.
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