I have a 2003 Nissan 350z Touring 6 speed with a Stock VLSD Diff.

The Car has 49,000 miles. I am the original owner.

It's about 450-500 WHP, and I do Drag Race it Some.

2500 miles ago I noticed the Pinion begining to Whine on Decel and no load. And it has gotten noticablly louder, but I could live with it.

Now, I just installed solid Diff bushings and the Whine is a lot louder( 2-3 times louder), and Now I can't live with it anymore.

Any Ideas to correct the situation?

Is it possable to tighten up the preload on the Pinion?

Or do I need to rebiuld the Whole Pumpkin?

 

Did you have a different rear installed or is it the original.

 

Hard bushing are always going to make noise even with a brand new dif.

 

Mine just got significantly louder. It happens above 40, only when the car is cruising. By that I mean on accel or decel it goes away but at steady speed it whines. I changed the diff oil, no change.