Grinding noise when backing up and turning

[chadkatona]

The notes on the repair order are " Found ABS motor unwanted operation, as per FSE there is an internal PI for software reprogram. Reprogram the EBCM".

Here is my VIN# 2G1FT1EW2A9191294. You should be able to call the dealer and they should be able to look up my VIN and find the exact resolution.

Hopefully this is helpful. It took me several months to finally figure this out!!

[Rhetor]

Originally Posted by chadkatona

The notes on the repair order are " Found ABS motor unwanted operation, as per FSE there is an internal PI for software reprogram. Reprogram the EBCM".

Here is my VIN# 2G1FT1EW2A9191294. You should be able to call the dealer and they should be able to look up my VIN and find the exact resolution.

Hopefully this is helpful. It took me several months to finally figure this out!!

Thanks, Chad . . .

I really appreciate it!

[toehead93]

I have this issue too with my A6, is it just the ABS?

[camero]

Originally Posted by SlingShot

1. Do all the cars having this problem have the manual trans ?
2. Are all these cars setting the E-brake ?
3. Could it be the E-brake hanging until the car gets rolling ?

Yeah I have the V6 with the manual and set my brake every time. It does kind of feel like it could be the brake dragging a little on the rear maybe. But it only does it while turning in reverse so that's hard to explain. It doesn't seem like the ABS because with a stick-shift I'm not even touching the brakes when backing up and hearing the sound.

Originally Posted by 71cam

The car has wide front tires 245's and when turning very sharp and going very slow, the front of the car may feel like it is skipping(grinding) a bit over the road and pulsating a little bit. This is normal due to the wide tires and the alignment settings.

Yeah I was told by a design engineer at GM that the alignment is a little off during sharp turns and the tires can slip some so I think it might be that or the limited slip diff not allowing the tires to slip enough in a hard corner. I describe the sound as graunching; almost like you're backing over crunchy snow. I only hear it when turning very sharp at low speeds and mostly when the car has been sitting for hours.

[chadkatona]

the problem with the camaro is the abs unwanted operation (software issue). It only happens when backing up with the wheels slightly turned. Shouldn't really matter whether its a manual or auto since it is a brake issue. The engineers are fully aware of the issue and trying to figure out a resolution. As far as other vehicles I doubt they have the same software glitch as the GM's.

[chadkatona]

If you feel a slight vibration in the brake pedal while you are hearing the noise than this is the abs problem if there is no vibration in the brake pedal you might have another issue. When I brought my vehicle in for test they had the computer hooked up when the problem occured so they know exactly what the issue is

[camero]

Someone should go pull their abs fuse and see if they still have the sound!

[Russell James]

It's an ABS system test. Probably at the wrong time, for which I would anticipate a reprogramming update for at some point.

[Kakashi]

Originally Posted by chadkatona

the problem with the camaro is the abs unwanted operation (software issue). It only happens when backing up with the wheels slightly turned. Shouldn't really matter whether its a manual or auto since it is a brake issue. The engineers are fully aware of the issue and trying to figure out a resolution. As far as other vehicles I doubt they have the same software glitch as the GM's.

Any way we can find out when they hit the magic spot on the software update (TSB/PI#) to ask for this specifically at our dealers? Of course, besides calling the dealer every day to ask

[Kakashi]

Originally Posted by SlingShot

OK ... I've reported having the same issues when backing out of my drive. My questions for you guys are ...

1. Do all the cars having this problem have the manual trans ?

2. Are all these cars setting the E-brake ?

3. Could it be the E-brake hanging until the car gets rolling ?

1. M6 LS3 here
2. Yes I set the e-brake after I park the car and take it off before rolling
3. Doubt it. It can happen just the same when coming out of a parking in reverse (ie. just after turning the car on) or after driving for some time (ie. when you get to your destination and have to park in reverse)

[camero]

I finally took my baby to the Chevy dealer for the moaning grinding noise that I heard when backing up because it was definitely getting worse and even happening when going forward and for longer and longer times after cold startups. They agreed with me about it sounding like the Limited Slip Differential and after waiting to check it out for 6 hours determined that it was the diff and changed the fluid and put in an additive that seems to allow the limited slip to slip a little more. (It really did sound like the tires slipping and the clutch plates in the diff rubbing because it was just too tight.) After getting it back I'm almost sure it drives better and corners easier. Besides the sounds and tightness in slow cold corners I think it was binding a little all the time because now it seems to just glide around turns with the greatest of ease. I hate to think how much wear I might have been putting on the diff and the rear tires all this time by not taking it in sooner. Everyone that suspects that they have the problem might want to take it in. I have the V6 LS2 with the manual. I think the automatics don't have the LSD at least not the V6's. Here's a photo of the labels from the fluid and the additive that they put in and the back of the additive bottle that I think did the trick!

[calbert1999]

Same here; Happens at about 75% turn, left or right, pressing on brakes at extremely slow speeds. ie - Parking, backing up.
If I release the breaks slightly the noixe goes away a little.
IMO; I don't believe it has anything to do with the diff, I had mine flushed already and had the additive put in as well, and the problem is still there. Seems to have gotten worse over time so I would be leaning more to the ABS.

[fastkevman]

I have a 2011 with the same issue.
I back into my parking spot at home, so that leaves out a cold issue, rust, or e-brake hang-up for me since it is doing it when I get home after driving it around.
I am almost always turning the wheel one way or the other when backing in but, never full lock and I have heard it turned either way, doesn't seem to matter left or right.
I am very certain it is in the front of the car due to the fact that when I have heard it with the windows down and radio turned off, the noise seemed louder when I was almost completely in my spot, I park right next to my 4Runner's passenger side so I relate this to the echo off my 4Runner making the noise appear louder.
I have never heard it when reversing on even pavement, where I park at home is a slight downhill grade.
It is definitely a metal grinding sound and has nothing to do with tire drag, I will gladly hook up tow chains from my pickup to anyone's Camaro and drag them all over a parking lot if they need convincing of that.

I understand how this could be an ABS issue but, I would think the program code they use for the Camaro ABS unit would be nearly identical to any other GM product with a similar system.
I have never read or heard of any disclaimer from any automotive manufacturer that states the ABS unit would need to be re-programmed or wouldn't work for other than stock size wheels/tires, a brake upgrade, or additional weight added to the car, I'm going to check the manual again maybe there is some fine print I missed.

I am taking my car in for it's first oil change and to take care of some other issues this week.
If they do anything I will be sure to post up.
By the way I have just under 1700miles on my car and it first made this noise around 400 miles, does it once or twice a week.

[calbert1999]

After driving this evening I made a point to pay more attention, and the sound seems to happening starting at about a 1/4 turn of the wheel, doesn't seem to care if it's in forward, reverse or no motion at all as long as it is at a stop / go speed (turning a corner from a dead stop), or turning slightly at a very slow speed. Also, seems to happen when pressure on the breaks. If brakes are not pressed (vehicle in neutral on m6 v8, clutch down), and turning steering for example to backup, seems to occur at around 1/2 - 3/4 turn.