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Whining/Grinding Noise From Front Axles

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Old 05-16-2012, 04:10 AM   #1
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Default Whining/Grinding Noise From Front Axles

Hi Guys! Looking for some feedback on what I think is probably a non issue and tire related, as they are breaking in, rather than an issue with the front CV joints! My 2.0t A6 is nearing 5K and I will have this checked out at the first service, but has anyone experienced a whining/grinding sound (very faint) when the car is driven from a full stop with the steering wheel locked all the way to the left or right? The sound seems to come from the front axles and goes away when the steering wheel is released ever so slightly from the lock to lock position! The frequency of the sound also increases as the car's speed increases while the wheel is locked all the way left or right!

????

Thanks!
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Old 05-16-2012, 06:28 AM   #2
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I have the 3.0 but have never experienced it. I would definitely have the dealer take a look at it.
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Old 05-16-2012, 07:50 AM   #3
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Quote:
Originally Posted by Jatmobil View Post
Hi Guys! Looking for some feedback on what I think is probably a non issue and tire related, as they are breaking in, rather than an issue with the front CV joints! My 2.0t A6 is nearing 5K and I will have this checked out at the first service, but has anyone experienced a whining/grinding sound (very faint) when the car is driven from a full stop with the steering wheel locked all the way to the left or right? The sound seems to come from the front axles and goes away when the steering wheel is released ever so slightly from the lock to lock position! The frequency of the sound also increases as the car's speed increases while the wheel is locked all the way left or right!

????

Thanks!
I had same issue and took it to dealer to examine. I only have 2300Km and was worried if low fluid condition or bad joint exists. The dealer told me this is normal and nothing wrong, it seems to be a characteristic of steering mechanism. However searching forum across other models you will see threads discussed on A4 about TSB:
The applicable TSB is 22022643/1. It states:
Quote:
"Customers with dynamic steering (1N7 - Audi Drive Select) may complain of a shudder in the steering wheel or a knocking noise when the steering wheel is turned during parking lot maneuvers or while driving at low speeds (below 5mph). Technical Background: Currently under investigation. Service: No repair is available at this time. Do not replace any components. (1) Instruct the customer that the condition will not impede the performance or use of the vehicle. (2) Submit a Technical Assistance Center (TAC) ticket and contact an Audi TAC consultant. As soon as further information is known, this TSB will be updated."

One solution was to replace power steering hose, I did not pursue the TSB as it does not bother me much and trying in most of time not to lock wheels (if situation allows).

But you should still check it in case something else specific to your car & may show him TSB and steering hose if it applies to A6.
Let us know!!
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Old 05-16-2012, 12:29 PM   #4
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FWIW my B5 S4 did that and so does my B8 S4. I never got a good explanation for it on my B5, although some thought it was related to the speed differential of the outer and inner wheel (while turning) -- it only happens under power so perhaps the differential is sending the same power to both sides but the tires are spinning at different speeds.

*edit* meant to post this under the main thread since I was answering the OP
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Old 05-16-2012, 06:58 PM   #5
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Quote:
Originally Posted by stoulana View Post
I had same issue and took it to dealer to examine. I only have 2300Km and was worried if low fluid condition or bad joint exists. The dealer told me this is normal and nothing wrong, it seems to be a characteristic of steering mechanism. However searching forum across other models you will see threads discussed on A4 about TSB:
The applicable TSB is 22022643/1. It states:
Quote:
"Customers with dynamic steering (1N7 - Audi Drive Select) may complain of a shudder in the steering wheel or a knocking noise when the steering wheel is turned during parking lot maneuvers or while driving at low speeds (below 5mph). Technical Background: Currently under investigation. Service: No repair is available at this time. Do not replace any components. (1) Instruct the customer that the condition will not impede the performance or use of the vehicle. (2) Submit a Technical Assistance Center (TAC) ticket and contact an Audi TAC consultant. As soon as further information is known, this TSB will be updated."

One solution was to replace power steering hose, I did not pursue the TSB as it does not bother me much and trying in most of time not to lock wheels (if situation allows).
The TSB was updated for the 2009/early 2010 A4 with replacement of new reinforced power steering hoses. Problem solved back in 2010. Was not just for ADS cars however - affected all early B8 A4s.
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Old 05-29-2012, 01:04 PM   #6
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Default Quick Update

So, the car is in with the dealer for the 5K service. They had me reproduce the whining/squealing/grinding sound from the front drive shafts which I did. It turns out, the wheel has to be off center, left or right, and not necessarily turned all the way left or right. I was able to reporduce the sound, and the service advisor heard it clearly. He thought at first that it's just the CV boots rubbing against itself when compressed due to the turned wheels. So they were going to spray them down with some silicone lube to see if it goes away! Turns out that didn't do the trick!

Got a call just now stating that "They now have Audi involved!!"

Hopefully, it's not a big deal (I really don't want the front end opened up to replace any of it) but in case it is, then a word to the wise: Please check your cars as well and see if you have the same problem!
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Old 05-29-2012, 04:15 PM   #7
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Hopefully it gets all fixed, let us know what was the issue as I was told by my dealer this is normal, but symptoms may not be the same. Keep us updated & good luck.
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Old 05-30-2012, 01:59 AM   #8
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I noticed the same noise, but haven't had time to post about it.

Mine makes the same whining/grinding noise when driving slowly and turning. It is very noticeable with the windows down and radio off.

I just hit 5000 miles, but haven't taken it in for the first service yet.

Thanks for keeping us updated! I hope it is an easy fix as we have a trip to Germany planned in about 2 weeks.
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Old 05-31-2012, 07:17 AM   #9
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UPDATE

Got a call yesterday from my dealer saying that they had ordered a part which would arrive today (a.m.) and the car should hopefully be ready later today.

Just got off the phone with my service advisor. The part that was ordered is fluid for the final drive/differntial for the CVT. Audi Tech had them check the fluid leve, and it was low (not dangerously low though) from the factory. Audi Tech has recommended that the fluid level be restored and that should resolve the issue.

According to my service advisor, the fluid comes in a special bottle with a build in nozzle that fits into a small fill hole on the CVT and gets squirted in through that.

I would have assumed that the final drive/differntial would get the same fluid as the rest of the CVT. Wouldn't it? Maybe it does, but perhaps its the special bottle/nozzle that is needed? Lets see... I have my fingers crossed!!
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Old 05-31-2012, 07:39 AM   #10
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Quote:
Originally Posted by Jatmobil View Post
UPDATE

Got a call yesterday from my dealer saying that they had ordered a part which would arrive today (a.m.) and the car should hopefully be ready later today.

Just got off the phone with my service advisor. The part that was ordered is fluid for the final drive/differntial for the CVT. Audi Tech had them check the fluid leve, and it was low (not dangerously low though) from the factory. Audi Tech has recommended that the fluid level be restored and that should resolve the issue.

According to my service advisor, the fluid comes in a special bottle with a build in nozzle that fits into a small fill hole on the CVT and gets squirted in through that.

I would have assumed that the final drive/differntial would get the same fluid as the rest of the CVT. Wouldn't it? Maybe it does, but perhaps its the special bottle/nozzle that is needed? Lets see... I have my fingers crossed!!
Did they explain how CVT affects steering wheel mechanism or noise it makes when wheels are turned, they
could be sharing common part but I was expecting issue is steering mechanism but unclear they maybe be related.
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Old 05-31-2012, 07:45 AM   #11
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I don't see the steering mechanism being the issue, as the frequency of the sound increases with the wheel speed (final drive shaft rotaional speed increase)... so it is definitely the differntial/axles/knuckle etc.

The fact that even some 3.0t drivers are experiencing this tells me that it is not CVT related.

I think what I am being sold by the dealer/Audi Tech is a bunch of BS and I feel its a CV joint design/length issue.

Lets see!
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Old 06-01-2012, 06:48 AM   #12
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UPDATE #2 Jun 1st

The final differential fluid level was topped off as suggested by AudiTech but to no avail. The sound is still there.

Stopped by the dealer this a.m. to get some stuff out of my car and was told that an Audi field Rep will be coming by later today to look into the matter!

I think I(we) might be on to something here!

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Old 06-01-2012, 07:04 AM   #13
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Hope it all works out for you!
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Old 06-06-2012, 07:20 AM   #14
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Default UPDATE #3 Jun 6th

UPDATE #3 Jun 6th

Just got a call from the dealer! Audi-Tech has authorized a new transmission to be ordered. They would not allow the dealership to disassemble the old to find out which part is failing or close to failure! They should have the new tranny in by early next week. I am hoping this is it! But we shall see!

They have been really understanding about this issue! I was thinking that they would just send me on my way stating that they can't figure it out!

I know another user here darcivic00si has similar symptoms with his car! Well hopefully I have set the precedent here!
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Old 06-06-2012, 07:49 AM   #15
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Now I am wondering if we have different problems. Since I have the 8 speed and you have the CVT transmission....I wonder if the tranny really is your problem or not.

I won't be able to take my car in to get this checked out because I have a trip to Germany planned. I suppose if it breaks down on me over there, I will be in good hands anyways, lol.

Thanks for the updates!
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Old 06-12-2012, 09:50 PM   #16
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Any update? I have the same car but its fine right now, didn't really research much about the CVT when I bought it, seems like this is a trouble spot with Audi's. I guess it would be wise to buy the extended warranty once my car hits 4 years/50k. Any idea how much that is?

Keep us updated on your issue. Who is your dealer in NJ?
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Old 06-12-2012, 10:32 PM   #17
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Does anyone know if the CVT in the 2012 A6 is redesigned? I was reading around and noticed a lot of people have problems with this CVT.....and they can't do much because the dealer usually wants $9k to repair. Surprised that Audi does not step up and at least goodwill 50% of the repair. I don't know about you guys but I don't think I could stomach such an expensive repair.

My plan was to keep this car for the next 8 years. My best bet would be to get a extended warranty after the 4/50k expires, anyone know any good warranties? Does Audi offer one?
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Old 06-12-2012, 10:36 PM   #18
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Does anyone know if the CVT in the 2012 A6 is redesigned? I was reading around and noticed a lot of people have problems with this CVT.....and they can't do much because the dealer usually wants $9k to repair. Surprised that Audi does not step up and at least goodwill 50% of the repair. I don't know about you guys but I don't think I could stomach such an expensive repair.

My plan was to keep this car for the next 8 years. My best bet would be to get a extended warranty after the 4/50k expires, anyone know any good warranties? Does Audi offer one?
For that very reason (the CVT) is why I have held off buying the 2.0. They now have an option for the 8 speed transmission and while it's about $2,000 more (but also includes Quattro) - I believe it will be worth getting.
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Old 06-13-2012, 06:52 AM   #19
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Default UPDATE #4 Jun 13th

UPDATE #4 Jun 13th

Picked up the car yesterday! Brand new CVT(not rebuilt) was installed and the noise has disappeared. (for now - let's hope it doesn't come back). The issue was with the final drive on the CVT.

Looked at the repair invoice... they changed everything - kuckle, bearings, rotors, axles, before determinng it was the CVT. Not sure if they put all the other older parts back in. Probably not.

Total bill was for about $10k which ofcourse Audi footted!
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Old 06-13-2012, 07:00 AM   #20
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aretardedorange FYI - I have been dealing with DCH Millburn Audi... very pleasant experience so far! Nice bunch of people to deal with!
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