George Runyon

So that grinding noise when I was braking extremely hard in my new 2012 Mustang GT ended up being a bolt on the driftshaft that was sticking out too much and rubbing on something when you hit the brakes hard enough for it to shift around. He said it looked like someone had probably taken it out or taken it apart at one point. Do you guys have any idea why one would do this? Is this part of the procedure for installing gears in the back?

The car overall was completely stock except for a Bama tune. I confirmed this because I found his Bama tune sheet in the glove compartment, and he had no mods not even a cold air intake. So I kind of highly doubt anything was messed with down there, but who knows...

Andy13186

Its a 2012 with a 3 year 36000 mile bumper to bumper warranty and 5 year 60k mile powertrain warranty, you should take it to ford and tell them to fix it or replace it for free. not sure why it would be loose though.


also, if you dont have the tuner, the car was probably returned to stock before you bought it, or else that guys tuner is useless and still bound to your car

George Runyon

I took it to Ford and the shop foreman drove the car with me in it, duplicated it, and then put it up on a lift and had it fixed within 5 minutes. Then he handed the keys to me and said have a nice day.

Still wondering why that happened, though. Small chance it was wrong from the factory or backed out naturally. Bigger chance the previous owner was messing with something?

Andy13186

may have been modded with an aftermarket driveshaft and tune, mabe intake too- then returned to stock before he sold it. Make sure all the bolts holding the intake on and together are secure. mufflers and exhaust bolts and lugnuts too just to be sure.

petrock

If it was the bolt(s) that connect the drive shaft to the rear differential, then there are a lot of perfectly valid reasons to remove them. The bolts back there also go through a lot of vibration, so it could have backed out on its own. It isn’t unheard of. Good to hear you got it fixed. Enjoy the new (to you) ride...

JFitz

If he just bolted the old DS on it may not be balanced anymore. Those things have stickers on them about discarding if dropped.

'Cause its so damn hard to balance one. Not cool.

If/when I sell my Mustang, I'll consider the Shaftmasters DS to be my gift to them. Enjoy the balanced and lighter driveline that CAN ACTUALLY BE BALANCED BY MERE MORTALS.

AMDanBailer

It sounds like the previous owner had a 1-piece driveshaft on your car and then returned it to stock when selling the car. He must not have tightened up the bolts properly, causing one of the bolts to back out!

The good thing is it sounds like it's fixed now, correct?

-Dan