I'm pretty sure that I've got a seized universal joint. I won't know for sure until I drop the driveshaft and check, but I'm trying to be ready for it. It's an 04 G35 sedan 6mt with 94k miles. I already called the dealership, and they're telling me they don't show a universal joint as an available part...I would have to buy the whole driveshaft (to the tune of ~$700). I saw something online that seemed to indicate the factory stakes the u-joint cups into place rather than clips like replaceable u-joints have, but I haven't been back under the car again. Sounds like crap to me, there's got to be something easier/less expensive than replacing the whole driveshaft. Anyone else had to deal with this?

 

What symptoms do you have? I'm wondering if mine is shot?

 

Check out www.slidegood.com, they may have a drive shaft. I found one for a coupe, but no have no idea if it fits a sedan and it doesn't say whether it's auto or manual.

http://www.slidegood.com/make-model/...ive-shaft.html

Call then anyway if it's not on their site - I got my 6mt drive shaft through them for my auto to manual conversion.

 

I had an excessive amount of vibration that I couldn't attribute to any single wheel and felt like it was coming from under the car. I pulled the driveshaft and although it wasn't the smoothest thing in the world, nothing was seized and I'm still using it (30k later). After doing that, I took it in and had all the wheels rebalanced and that turned out to be the culprit.