Deysha was good enough to open a ticket for me on mine but non of the Ford dealers will diagnose it. the vibration starts at 78MPH and because that is above the speed limit they will not work on my Mustang. The Ford procedure does not let them take it to a Dyno where they could run it up and putting it on jack stands is a safety issue so they will not do that either. I guess I spent way too much money on a beautiful car that Ford does not want to support.


2014 Mustang GT Track Pack.

 

The dealer is taking my car in on Monday finally. Hope they can come up with something fast

 

While I don't have my 2014 Mustang anymore (creating this thread for) I was able to cure the vibration by installing a $1250.00 Carbon fiber driveshaft from DSS. When the 2015's came to the dealers lots, I could not help but purge myself of my 2014 for a new one, even though the vibration was fixed. If you're thinking of getting a new driveshaft for the vibration, don't get the aluminum version, it did not reduce enough of the vibration, taking another purchase to a carbon fiber version to solve. Mind you I spent $2000 of my hard earned dollars trying to solve Ford's design flaw.

 

I have a 2014 Mustang V6 premium with 8600 miles. I had my 7500 mile oil change and tire rotation and that's where the problems started.

I now have a vibration when going 75+ miles an hour, that rattles the entire car. The dealership balanced the tires and that solved nothing. They then replaced all 4 of my tires claiming it was a tire issue, said "they had rode tested it and I was good to go" that was not the case vibration was still there with no noticeable change. Service attendant was non responsive for a week, so I contacted the Manager and took him on a test drive, he agreed that it needed to be looked at, that was over a week ago.

I talked to him this morning and he said they were going to check out the rear differential and get back to me......I'm starting to lose faith....

What else can I do?

 

Replace the stock driveshaft with a DSS Carbon Fiber unit. While they do cost approximately $1250, it will be worth it in the long run.

 

Kaiser:

My 2013/M6/3.73 had the same problem. Ford just bought it back because it was actually a transmission issue and they were on back order for an undetermined amount of time.

Make sure they put the vibration sensor on the shifter handle when they inevitably run the vibration test. It will save you time.