Yikes....Yeah I'd say you want to be careful. :eek:

Just pick up a one piece drive shaft and u'll be fine.

Yep that's what I saw. There has been some that have let go during dyno runs from what I have heard as well.

that would scare the poopies out of you I bet lol

Wow....scary!

Sounds like a serious design flaw in the driveshaft. Is Ford doing anything about this ?

It's not been an issue for people other than those that have removed the speed limiter from what I've read. It's just not meant to spin that fast.

^^^^exactly

That looks nasty. However, I haven't got my mustang much over 130 Km/hr. I am more interested in increases in initial acceleration from stop. From what I've read you can customize your tuner to address this issue. Still thinking about it.

The driveshaft failures have been an issue since '05...at least on the V6 cars. The earlier cars had a 112mph setting on the speed limiter. A one piece aluminum driveshaft is a good investment. Part of the problem is the design of the 'shaft itself... The slip joint (for lack of a better word) is right in the middle of the driveshaft instead of at the front end, like most cars. This may be acceptable on a 4X4 truck, but on a "sports" car, it's a bad idea. I also think there are some driveline angle issues (perhaps pinion angle), as I have already had to replace the rear u-joint on my aftermarket driveshaft.
Something else to consider... If you intend to add lower gears to the rear end, and I highly recommend you do (the 3.7 is a screamer and would respond very well to a set of 3.73s or 4.10s), the speed at which a failure will occur will be considerably lower. With lower gears, the driveshaft speed will be higher for any given MPH.