Originally Posted by roddy

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.