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Discussion Starter · #21 ·
I had the exact same problem on my '98 and it was the tire. New tires and a balance solved the problem on mine. I figured it out after I moved the front tire to the back but not before I replaced the front wheel bearing.
I’m glad you were able to figure it out. The problem with mine is that rotating the tires made no difference and neither did swapping out rims and tires. All new Wheel bearings on the car. This is why I’m suspicious when the dealer says it’s tire noise. Guess we will find out. I needed new tires anyway. Lol
 

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Discussion Starter · #22 ·
So had the new tires mounted and balanced. Ford called and said that the rear end noise was still there (which I had told them 🙄). They are having a specialist look at it tomorrow morning, said they wanted to make it right for me. Stay tuned lol
 

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I would make sure that they don't charge you for some of that work, reimburse you, or give you a future credit. If this were me I wouldn't be too happy. They insisted that it was tires even after you did your due diligence to rule out the tires and they still went ahead with their assertion. That drips with laziness and not being thorough on their part. The dealers have sound equipment to find where a noise is emanating from on a test drive. They should have used that before saying that it was your tires even after you told them what you did to pretty much rule out the tires and wheels.
 

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I would make sure that they don't charge you for some of that work, reimburse you, or give you a future credit. If this were me I wouldn't be too happy. They insisted that it was tires even after you did your due diligence to rule out the tires and they still went ahead with their assertion. That drips with laziness and not being thorough on their part. The dealers have sound equipment to find where a noise is emanating from on a test drive. They should have used that before saying that it was your tires even after you told them what you did to pretty much rule out the tires and wheels.
The problem with shops these days is the corporate structure doesn’t really allow them the time to diagnose anything anymore. They’d rather do 100 brake jobs than tie up a mechanic and a lift for an hour to look for a noise. I work for a construction equipment dealer and it’s the same here. They want the bulldozers etc in and out and if it’s taking too long to diagnose they try to find a way to move on to the next dozer.
Stinks. It also stinks that you can’t talk to a mechanic. You have to speak with the middle man who doesn’t know much. Our service managers are kids with degrees, not mechanics. So the boss has to ask his underling mechanics what’s what.
 

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I agree. It's a sad state of affairs at many dealers. Having a reasonable and knowledgeable service manager is important but from my own experience I know that many are completely the opposite. The first dealer I dealt with near where I live now was awful. Service managers knew nothing and liked to overcharge me for this and that. Mechanics pretty much sucked too. Left my vehicle with fuel leaks and then left a mess in the interior and engine compartment.
I found another one a bit farther away that seems to be pretty reliable thankfully. Their hourly rate and typical week or so wait to get in for an appointment is a bit of a put off though. However, it's worth it for those jobs I definitely don't want to do and the serv. manager there is a smart guy.
I recommend that people shop around for a good servicing dealer. They definitely vary in quality.
 

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I agree. It's a sad state of affairs at many dealers. Having a reasonable and knowledgeable service manager is important but from my own experience I know that many are completely the opposite. The first dealer I dealt with near where I live now was awful. Service managers knew nothing and liked to overcharge me for this and that. Mechanics pretty much sucked too. Left my vehicle with fuel leaks and then left a mess in the interior and engine compartment.
I found another one a bit farther away that seems to be pretty reliable thankfully. Their hourly rate and typical week or so wait to get in for an appointment is a bit of a put off though. However, it's worth it for those jobs I definitely don't want to do and the serv. manager there is a smart guy.
I recommend that people shop around for a good servicing dealer. They definitely vary in quality.
What’s funny is our old service mrg who was a 25 yr old punk just left and they’re letting an experienced mechanic fill the spot until they can find an inexperienced guy with a degree.
 

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Things are so backwards. An experienced mechanic should have that job to begin with. As a guy who knows his way around cars I can always tell when I'm talking to someone behind the desk that doesn't know much or are trying to bs me. From how the serv. manager at my dealer talks I suspect that he was a mechanic for some time.
 

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Discussion Starter · #28 ·
Alright so I went to the dealer today. Brand new tires on the car and was informed that the car is still making noise “intermittently”. I took the car for a test drive with the service manager and the noise is still the same as it was before. Apparently the “differential” specialist took a look at the rear end and didn’t find anything wrong. The noise is apparent and is obviously not normal. Told them to keep the car and fix the problem. It has to be something on the driveline; I suggested maybe a pinion or carrier bearing or maybe even a U joint. It’s very frustrating and I feel like the ball is being dropped, I have serious doubts as to whether the rear end was actually looked at. My car has been in the shop for a week. To be continued.
 

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I wish you had a video of the sound , so we could hear how it sounds and come up with some help and tips.

Skickat från min SM-N975F via Tapatalk
 

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Not cool at all. This is so relevant to our service manager comments. I think that your dealer needs to hire a new serv. manager. It would seem to me that they aren't serious about fixing your car. I hope that they don't dare attempt to charge you for "trying" to find the noise because you owe them nothing. Actually, just the opposite imo.
My own dealer told me that they have sound equipment to put on the car in certain locations in order to isolate noise. I would assume that it consists of a microphone(s), decibel meter(s), recorder, and computer. Order your dealer to do it or get an explanation of why they won't. If your dealer refuses to do that then I suggest that you move on to the next closest dealer with a good reputation.
It has to be something with the differential. At this point there's literally nothing else besides the tailshaft of the transmission maybe but the bearing there going bad would be pretty rare and that's more in the middle of the car too.
 

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After reading all the posts here,my vote says U Joints,flat worn spots on one of the joints needle bearings inside one or more of the cups.
 

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If it’s not warranty work you’re probably better off elsewhere. The dealership is usually the worst place to take something unless it’s free.
 

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Speaking as someone who spent the better part of 2 decades at dealerships as a service writer I would suggest reaching out to Ford customer service, explain the situation, and ask them to "open a case" on this issue. Also tell them you would like a return call from the District Service Manager as you are not getting resolution from the service manager and service department. You could take a further step and arrange a meeting in person with the General Manager of the dealership.
All of this draws attention from many areas to your problem, and Ford must find a resolution once a case has been opened. This is all provided the vehicle is under factory Ford powertrain warranty.

The root problem lies with the manufacturers not the dealer to be completely honest. Some dealerships are staffed by real good people that truly care and even for them it is difficult to make a living under the system they are under. Warranty will pay them zero for diagnosis unless they can confirm a failure. If in fact they can even claim diag it will honestly barely pay them enough to cover getting your keys, pulling in the car, driving the car, parking the car, and doing paperwork.
Warranty will demand they eliminate all other sources of possible noise way before they authorize the use of chassis-ears (the multiple microphone device mentioned in this thread). These will usually involve 2 techs and/or shop foreman, multiple drives at various speeds, multiple times of moving the microphones, eliminating and isolating all other causes of noise to the point of stripping your interior.

They can't just throw parts at the car either as everything thing they do, every part replaced under warranty is looked at. If the manufacturer decides they are replacing more than they "should" (cost per repair order) then the dealership gets audited by the manufacturer, VERY bad. Go further and diagnose the wrong part as the failure (as your best guess).. it will be called for and inspected by Ford. Try to return it to parts... nope.. it's been installed. Get a couple like either of those scenarios and see how long you last.

I cannot count the times, and wasted days of trying to track noises by some of the best I've seen over the years. The big thing here is there is no way a tech is not going to lose out, big time, and I have seen it.
Nothing like going home to tell your wife you made 20 hours this week (even though you were there for 65) because warranty would not pay and you had spent 2 days chasing noises and electrical shorts with next to no diagnostic time.

Now.. with all that aside. By involving the district manager and GM, you will draw enough attention to get a salaried shop foreman and/or factory field tech (who are the BEST in the business) to spend all the time really needed to find and fix the problem.
What should have happened was a new car should have been pulled in, and your wheels swapped for a test drive. This would have eliminated the possibility of the tires being the cause (although could still be adding). This however cannot just be done by a tech, it would require going to at the least the New Car Manager and cashing in a favor/begging for new car keys, to put on a lift (and take the damage risk) to go further (for free, while they potentially miss real paying work orders that comes in)
.. again it is the system the men are under.
 

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Discussion Starter · #34 · (Edited)
Thank you for all the replies and advice. I’m a bit disappointed with how this has been taken care of. It’s been a bit painful as I need the car for work and I’m refusing to pay for the loaner they gave me while they were fumbling around on this job. I’ve received news that I’m looking at pretty much a rear end rebuild. They believe it to be the pinion and carrier bearings (which I agree with). That being said I’m looking at $2251 for the whole job, new tires (which I needed anyway) and the rear end job. Would now be a bad time to ask to get the 3.73 gears. Hahaha Just kidding. Also a bit sad that the rear end needs new parts at only 55k on the car. Damn
 

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I'd search for a local shop that will install customer supplied parts and only charge for labor. I bought all my parts to refresh my rear axle minus ring gear and pinion. All parts except the axle shafts were Ford Performance parts. Found a local shop that only charged me $275 labor.
 

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My Ford dealer installs parts that I almost always supply. They just don't warranty the part obviously. I save lots of $ by not letting them sometimes double the cost of the parts because ironically I buy those very same Ford/Motorcraft parts from a Ford dealer online. They'll also install auto parts store brands as well. Depending on where you live or business owner policy there may be some places that will refuse to install anything that they don't sell you themselves but I think they are rarer these days.
 

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Thank you for all the replies and advice. I’m a bit disappointed with how this has been taken care of. It’s been a bit painful as I need the car for work and I’m refusing to pay for the loaner they gave me while they were fumbling around on this job. I’ve received news that I’m looking at pretty much a rear end rebuild. They believe it to be the pinion and carrier bearings (which I agree with). That being said I’m looking at $2251 for the whole job, new tires (which I needed anyway) and the rear end job. Would now be a bad time to ask to get the 3.73 gears. Hahaha Just kidding. Also a bit sad that the rear end needs new parts at only 55k on the car. Damn
Yes. Now is exactly the time to swap gears.
I would forget the dealer for this if it was me. I had been thinking this was a warranty issue.

I would seek out the local and better Mustang shops in the area (that do dyno tunes, and builds). I would ask them how much for a gear swap and replace all bearing as you have some rear end noise. Mainly gear kits come with all bearings around $300. Pay them the $400-500 or whatever they want for labor and be done with it, and get more torquey gears.

BTW to my knowledge these rears are very solid. A bad bearing at such mileage is a very rare case that I have seen.
I put 335,000 miles on my Fox 8.8 rear (with roughly 400 HP), and 132,000 miles on my 8.8 S197.
 

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or look for a driveline/transmission specialty shop . . . I found a really good one, right in my little home town, that has turned out to be a gem; they do good work, are easy to work with, and are very reasonable on their labor charges . . . they are out there
 

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So ford contacted me today and informed me that all the rear end noise seems to be coming from the tires. I was a little skeptical of this as I threw old rims and tires on and had the same noise. According to the tech he used a mechanics stethoscope and arrived at the tire conclusion. I’m getting new tires mounted and an alignment. Crossing my fingers that this is all it was.
So ford contacted me today and informed me that all the rear end noise seems to be coming from the tires. I was a little skeptical of this as I threw old rims and tires on and had the same noise. According to the tech he used a mechanics stethoscope and arrived at the tire conclusion. I’m getting new tires mounted and an alignment. Crossing my fingers that this is all it was.
I had the niose on 2010 and my 2013 gt both with worn out pirellis i thought i had tore rearend out but when changed tires it all went away good luck.
 
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