To whom it may concern

I have a 2014 Mustang GT manual transmission. I bought with 16,200 miles on it in 2016. I currently have 34900 miles to it now. One day I was crusing home from the movies when I started hearing a weird sound behind me. So i mute the radio & rolled up the windows & I can clearly hear the sound. It sounds like metal is rubbing not grinding. I thought it was my rear brakes. So I checked the rear breaks & my brakes are good. Then I got curious & unscrew the drain plus to the rear differential & found metal savings on the magnetic drain plus screw. Would the be from the gears or the bearing. The metal shavings look aluminum.

NEED HELP!! My baby girl needs your help ASAP!

 

Not sure what failed in the differential, but it will probably need to be rebuilt.

 

Aluminum isn't magnetic, it's probably steel. How much metal?
any changes in the noise depending on load? Like accelerating, decelerating, coasting, turning left, turning right? Could be a bearing

 

Certainly dosen't sound good. As previously noted aluminum isn't magnetic. On a more positive note a '14 with less than 60,000 miles on it should still have plenty of factory drivetrain warranty left even if you did buy it used. Take it to a local Ford dealer and see what's up. If you bought it at a Ford dealership I would go there first.

 

It's definitely not aluminum. There's nothing aluminum inside that pumpkin. I had a Bronco that had blown spider gears that ended up as chunks and shavings. Because of the way the parts inside a differential rotate and sheer against each other any metal that's in there ends up usually looking like shavings and very brightly colored fresh metal and it looks a lot like aluminum does.
But it should not be there in normal circumstances.
Get under warranty mentioned above. If not then find a shop that is known for handling rear gears. Usually every dealership or shop has a guy that's should be really good at them since he's the one they task with handling them all the time. When I changed mine I asked around and it ended up being a guy with 30 years as the ford dealers mechanic. I approached him and got him to do it on the side saving me the stealership crap.
Not saying that's the way to go but it's just the way it played out for me on my old truck and a two gears swaps on mustangs.

 

Do not procrastinate, have this looked at as soon as possible. speaking from experience, in the 80s I had a 66 Shelby GT350 that was making the same strange sound. I waited thinking it would heal itself, it did not. I damaged bearings, seals and scored the ring and pinion. I could not believe the damage I caused by waiting for the problem to go away. Good luck, hopefully its a minor problem.

 

Do have it checked soon just in case. Just some food for though here, my '13 started squeaking, and bumping in the rear area. Turned out to be the sway bar end links were bad. May want to check those also.