Originally Posted by 2011BlackRTR

Yes, the DS came with CV joints on both ends. Anything's possible, but the whine is only heard upon deceleration while in gear -- would that point to the driveshaft? While accelerating, there's no whine and no noise coming from the rear. It really sounds like the rear end is connected to the chassis of the car via some metal, and the sounds I hear are being transmitted via that link and not dampened properly like when I had the stock parts in there with the soft rubber bushings.

The DS came with a new pinion flange, but can't see how we could have messed that up -- we removed the pinion nut, pulled off the old flange, installed the new flange, tightened the nut all the way, then backed it off, applied thread locker, and finally torqued to ~ 140 ft-lbs.

I'll double-check the pinion flange/rear end angle versus the transmission angle to make sure they're parallel -- I read somewhere they should be the same angle, usually parallel with the ground. So either the angles are off, or something was over-tightened, or the gears are just noisy during in-gear deceleration. I need to spend some more time under my car

Originally Posted by thelastsumurai

What brand of D/S has CV's on both ends I'm shopping

Originally Posted by Napoleon85

Perhaps someone with personal experience will chime in, but I've seen this discussed in other threads and it doesn't sound abnormal. I believe that your suspicions are correct and there is just more noise being transferred through the suspension components into the cabin.