I've noticed a midranged squeaking noise when turning a full 90 degree corner either left or right. I've noticed it at low speeds but it may be present at all speeds and I just can't hear it due to the exhaust note. It is definitely coming from the rear end of the car but I can't say that it is either on the right or left side.
I tried it in reverse as well and the noise was still there. It isn't intermittent either. I can count on hearing it every time I turn a full corner. Partial turns do not seem to produce any noise. The car now has approx. 1000 miles on it but I do believe I've noticed the noise for at least the last 500 or so. It may have been there from the start and I just didn't notice it.
Any ideas.

Thanks in advance for any input.
James

Just looked through the thread on axle whine. Some people seem to be getting the whine from the rear just during turning. Does this sound like it could be the same issue? I'm taking it in to the dealership tomorrow morning and I would like to be armed with some good information in case they can't find an issue. First time to this service department so I really don't know what to expect from them.

It is a normal sound. Both my 07 and 08 had the same sound. Has to do with the clutch packs in the rear end I belive. Now with ~27000 miles on my 08, I do not hear it. I think over time parts wear and the sound goes away. at least that was my experience.

It is a normal sound. Both my 07 and 08 had the same sound. Has to do with the clutch packs in the rear end I belive. Now with ~27000 miles on my 08, I do not hear it. I think over time parts wear and the sound goes away. at least that was my experience.

Thanks for the input. We'll see what the service department has to say in the morning.

Verdict is clutch pack. They said that it should gradually go away with time and miles. I can have them look deeper into it now or just wait it out. I guess I'm going to give it some time. Hopefully, with the way I drive, the stiffness will work itself out quickly.

Have the service department put in some Friction Modifier or you can get a bottle from the dealer. It helps most who have the same issue as you and is only a 10min job.

Have the service department put in some Friction Modifier or you can get a bottle from the dealer. It helps most who have the same issue as you and is only a 10min job.

Thanks for the info. They did mention the friction modifier. If I purchase it and add it myself it shouldn't effect the warranty, right?

Thanks for the post, I'd like to keep trading information on this issue. I have a 2011 GT500 and experience the same issue. It's actually quite annoying, and a little embarrassing when giving rides :/

I have taken my car to the dealership as well (when I had about 3000 miles on it) and that was the same thing they told me, that it was the LSD clutching. In fact they gave me a print out with a response from Ford that said this:

702200 - NVH NOISE CONCERN - REAR
SPECIAL SERVICE MESSAGES
21287 2007-2011 MUSTANG CARBON FIBER LIMITED SLIP DIFFERENTIAL NORMAL NOISES
2007-2011 Mustang GT500, 2011 Mustang GT equipped with Brembo brake package, 2010 Mustang GT equipped with trackpack, 2006-2009 Buillitt
- Limited slip differential normal characteristics, these vehicles are equipped with heavy duty/racing type carbon fiber blutches in the limited slip differentials. This type of limited slip differential may exhibit a chatter or moan/groan noise when making sharp low speed turns. These noises are a normal characteristic of the heavy duty/racing type limited slip differential. Note: driving the vehicle in a tight figure eight pattern 5 times may lessen the complaint for a short period of time.
Effective date: 04/15/2010

Note: I have actually tried the remedy suggested and I didn't have any luck getting rid of the of the "chatter or moan/groan noise".

The dealer didn't mention anything about the friction additive, anyone have links or more advice?

Thanks guys.

Hi and this rear end noise is a disturbing issue with Ford. I just bought a 2011 Shelby with trac-pak and am not looking forward to this. I have owned 6 Ford F 150 4X4's with the 373 rear ends and limited slip with the exact same problem in each and every one of them. Friction modifier works and in one case it took two doses. Ford has obviously not dug deep enough into this problem.

I've noticed it at low speeds but it may be present at all speeds and I just can't hear it due to the exhaust note. It is definitely coming from the rear end

Thanks in advance for any input.
James[/QUOTE]

Mine does the same. I just stopped doing low speed turns and don't hear it any more LOL:silly:

I've also noticed it on more than one occasion when for instance making a hard u-turn in a wide cul-de-sac. My 09 has 7 K on it. So I wonder at what mileage, it "breaks in" ??

I've noticed the same noise forever. At first I attributed it to the tires on pavement. It sounds a lot like the rubber is squeaking against the road.

My car is at 3500 miles and the sound is the same as it was at 100.

I don't know if anything is being hurt by it, bring it to the dealer?


Brian

I've noticed the same noise forever. At first I attributed it to the tires on pavement. It sounds a lot like the rubber is squeaking against the road.

My car is at 3500 miles and the sound is the same as it was at 100.

I don't know if anything is being hurt by it, bring it to the dealer?


Brian

If yours has the same problem then you aren't hurting anything by driving it. I have 2,600 miles now and it seems to be getting quieter. But I do take corners pretty hard at speed. I'm going to let it run its course for awhile longer. Hopefully it will go away soon.

Another suggestion is to check the rear brake caliper. I have had this nagging sound when I was driving. It sounded like as if the exhaust hanger was rubbing the body of the car, the metal against metal sound. That was the only example I could think of to convey the sound I had heard. I went over the entire rear end hunting down the culprit. I even thought it might have been some bushings. However, wouldn't you know the very last thing that I thought it could be was the brake caliper. I sprayed that sucker good with WD40 to see if this was the culprit. I let it set for about 5 minutes and took it for a spin. Guess what? No more of annoying sound. Now I have to look at taking it apart to grease it up or maybe change it all together. The brake pad was worn more than the other side (passenger). It may be sticking at the springs that the cable (emergency parking brake) or it may just be sticking enough to rub. The brake pad has not reached the point of squealing to let you know to change the pads. I hope this helps someone else.

If the sound is heard more on turning then it most likely is caused by the clutch packs. As I said before, 6 trucks with the same 3.73 rear end and limited slip had the same problem. In each case friction modifier was the answer. One Ford mechanic had an interesting theory; he said because I do a lot of high speed highway the centrifigal force forces the oil out from between the clutches giving them more aggressive grip which doesnt allow them to slip on sharp cornering the way they should. Therefore the one who said driving slowly in circles for a while probably had a good idea in that the clutches might work some of the oil back between them.

I have the same problem/noise. I took it to the dealership twice. First time they didn't hear anything, the second time they heard it but said it was the blower by-pass making that noise. After reading about this issue under different titles( electric steering, rear end noise) on this forum web site, I went out and bought some friction modifier and added it today. I'll keep you guys informed,. I only have 1300 miles on the car and heard it from day one. I originally thought it was tires also. The dealer said it wasn't covered under warrenty adding the additive, so not to get totally raped by the dealership I spent the 6.64 for the friction modifier and did it myself.So that's my story on this rearend noise . I'll keep you guys informed ,maybe we should all buy stock in motorcraft friction modifier, I think sales are gonna go up alot-LOL-Tonyd1:)

I have the same problem/noise. I took it to the dealership twice. First time they didn't hear anything, the second time they heard it but said it was the blower by-pass making that noise. After reading about this issue under different titles( electric steering, rear end noise) on this forum web site, I went out and bought some friction modifier and added it today. I'll keep you guys informed,. I only have 1300 miles on the car and heard it from day one. I originally thought it was tires also. The dealer said it wasn't covered under warrenty adding the additive, so not to get totally raped by the dealership I spent the 6.64 for the friction modifier and did it myself.So that's my story on this rearend noise . I'll keep you guys informed ,maybe we should all buy stock in motorcraft friction modifier, I think sales are gonna go up alot-LOL-Tonyd1:)

Tonyd1,
You didn't mention what year your car is. Here's part of a TSB dealing with '05-'07 GTs. When I complained about that on my '09 GT500 the serv dept guys added the friction modifier w/o any questions.

Don't know if that applies to the '10s & '11s

8.8 LIMITED SLIP AXLE MOAN/GROAN NOISE TSB 08-5-10
DURING LOW SPEED TURNING MANEUVERS

ISSUE
Some 2005-2007 Mustang GT vehicles equipped
with the 8.8 inch limited slip axle may exhibit a
moan/groan noise when making tight low speed
turns. This may be more noticeable when the axle
is at full operating temperature. The noise may also
be confused as originating from the brakes or
steering system.

SERVICE PROCEDURE
1. ………
2. ………
3. Vehicles built after 10/22/2006 were built with
the new limited slip clutch pack. For these
vehicles, add 1 bottle of Motorcraftâ Additive
Friction Modifier to the axle. Perform several full
lock turns at low speeds in both directions to
force the lubricant into the limited slip clutch
pack.

Good Luck!

Mine car is a 2011, I added the modifier and will see if it fixes the issue,Hopefully it will. If ford's been having this issue for all these years now,Why don't they do something to correct it. the noise is really ignoring.-Tonyd1

Snake Doc,you and I have the same car,red/white stripe,2011_sweet car,Except for that damn noise.-Tonyd1

well took the grandkids to school in my 11 gt500,did about 8 circle turns each way to see if there was any noise and thank God, no noises. so we'll continue to see but I'm a happy gt500 owner now. Now I can enjoy my ride totally.-Tonyd1,PS-That's one hot schoolbus I'm driving LOL

Having the same issue with my 09. I don't have very many miles on it only about 2000. I would like to add the friction modifier myself. Does anyone have instructions for the easiest way to do so including any torq requirements necessary?

Hi 1Bad pony, I recommend getting an empty 2 cycle oil contaner (4 oz) and some type of suction device to take out only the amount needed to refill the rear end with the friction modifer. a small hose will help eliminate any spills,but not required on the refill. put the sqeeze cap on the bottle that comes with the modifier remove the rear end fill plug, squeeze the modifier in the rear end,reinstall the rear end plug, torque to 22 ftlbs.After do a series of figure 8's to make sure the modifier get to the clutch packs and then get a big smile on your face because the noise should be gone. It worked for me,Good luck-Tonyd1

Snake Doc,you and I have the same car,red/white stripe,2011_sweet car,Except for that damn noise.-Tonyd1

My car has a little over 900 mi and I haven't noticed the noise yet. I don't think all the cars have the problem, so maybe mine won't have it.

Great car. I think Ford pretty much got it right with the 2011. Will be interesting to see what they do with the 2012. :pimp:

Hi 1Bad pony, I recommend getting an empty 2 cycle oil contaner (4 oz) and some type of suction device to take out only the amount needed to refill the rear end with the friction modifer. a small hose will help eliminate any spills,but not required on the refill. put the sqeeze cap on the bottle that comes with the modifier remove the rear end fill plug, squeeze the modifier in the rear end,reinstall the rear end plug, torque to 22 ftlbs.After do a series of figure 8's to make sure the modifier get to the clutch packs and then get a big smile on your face because the noise should be gone. It worked for me,Good luck-Tonyd1

Thanks for the info Tonyd1. This may seem like a stupid question but exactly where is the fill plug located? My car is lowered so I'll have to get the rear end up on ramps or something to get under it and find it.

WITH YOU UNDER THE CAR ON YOUR BACK,AND YOUR HEAD LOOKING REAR ,IT'S ON THE RIGHT SIDE OF THE REAR END JUST AFT OF WHERE THE DRIVE SHAFT ATTACHES TO THE REAR END. . i WISH FORD PUT IT ALL ON THE REAR COVER BUT THAT WOULD MAKE TOO MUCH SENCE. OH BY THE WAY ,IT DEFFINEATLY DID FIX THE NOISE, MINE IS GONE ,THANK GOD FOR THAT.GOOD LUCK-TONY

Thanks Tony. I agree with you on the placement of the plug. But that's just "Par for the course" as far as Ford is concerned. Drake makes an aluminum diff. cover with the plug on the back for about $155.00. You can find them @ a site called AAPD.net. Looks cool - may have to invest. I appreciate the info cause I will be doing this myself. Not even going to attempt to ask my dealer. They are total D**KS! They refused to work with me on the clutch chatter TSB and today I went in with a coupon for a $29.00oil change and after waiting around for 45 min. they told me it would cost $90.00 dollars because of the specified oil. I grabbed my keys, walked in to the sales managers office, slammed the service ticket on his desk and told him what a shame it was that they treat their customers like garbage - especially those who buy $50K vehicles from them. Then after storming out I proceeded to leave two long black marks all the way across their lot. Not my fault though, the clutch slipped...LOL. Maybe they should have done the TSB:rofl:.

1BADPNY

I agree, dealerships are d_c_s, they'll find any excuse not to warrenty their vehcules.Mine said that adding the friction modifier wasn't covered under warrenty,that's why I bought one myself and did it myself. I really hate dealing with dealerships..Thanks for the info on that rear end cover. when I get a few bucks, I might get it._tonyd1

I agree, dealerships are d_c_s, they'll find any excuse not to warrenty their vehcules.Mine said that adding the friction modifier wasn't covered under warrenty,that's why I bought one myself and did it myself. I really hate dealing with dealerships..Thanks for the info on that rear end cover. when I get a few bucks, I might get it._tonyd1

A good customer oriented dealership won't try to avoid warranty work.

If you haven't already tried it, seek out the Serv Manager, he'll have incentive (commission/bonuses) to see that they have satisfied/repeat customers. :silly:

If that doesn't work for you, try the General Manager or look for another dealership.

Good Luck & good Hunting

Snake Doc,it was the service manager who said it wasn't covered under warrenty. You know, it only cost me $6.64 and I didn't have to deal with any dealership bullcrap. It's done, it's fixed and no noise anymore. I'm a Happy gt500 owner.-Tonyd1

If I were the svc mgr it would have been worth the $6.64 (?) + 10-15min labor for the good will.

Local dealership here comped a complete service on my Expedition because one of my seat cover bottoms (warranty) didn't come in when promised. Really pissed me off; it deprived me of a great opportunity to whine! :rofl: