Rebuilt E9X M3 Driveshafts

[chillphill]

Hey! Also curious, my u joint is done seems its not a diy fixable.

[IamFODI]

Originally Posted by chillphill

Hey! Also curious, my u joint is done seems its not a diy fixable.

I'm not an expert on this so I've tried to take in a lot of expert advice in the past few months. My understanding is that replacing the stock U-joint is doable, but that it's not easy and even in the best case scenario it'll never be quite the same as OE (though it might be close enough that you don't care).

1. You have to cut the old joint out, which means something will probably end up warped or out-of-round. Fixing that can be difficult or impossible, to the point that most shops won't take the risk.

2. You'll end up fastening the new U-joint in with removable clips. This makes it serviceable in the future, though possibly more vibration-prone over time as it's not quite as secure as the stock staked-in setup.

Sad to say this, but learning about all this this has diminished my interest in a rebuilt stock DS. In fact, as much as I'd hate to have to spend the better part of $2k on a new stock DS, everything else seems to have potential downsides (e.g. "new" aftermarket driveshafts don't use stock or stock-like tubes, 1-piece driveshafts including CF basically guarantee non-stock forces on the trans output & diff input, etc.). If OP('s rebuilder) is still doing this after 4 years, I'd still be curious, but a lot more cautious than when I expressed interest last Sept. Happy to hear if people think I'm wrong on any of this.