This has become a tough one to resolve. Not even reading the forum or Inifinity manual could nail culprit...
Basically, the bad is that coming to a stop makes front end rumble, until car stops completely. It is even felt in the floor as it rumbles. It feels like engine wants to continue acelerate if I am braking which in turn makes slightly more rumble.
It only happens when engine is warm.
It is independent of brake usage.
Rumble increases if I am turning left or right as I am stopping.
RPM looks to go down normally to 650RPM.

I replaced the front CV axles (car was driven without axle boots for a while)
2 months later replaced the front wheel bearings this winter. Bearings are easy to diagnose.
Front diff was driven for years with old fluid and low level of fluid. Replaced fluid, did not change a thing.

Now this. Not complaining!!!! Just need help!

 

Get the vehicle up in the air and spin each wheel by hand to see if it's something obvious. Is there any noise associated with it or just an ominous rumble/vibration through the chassis?

 

I replaced front brakes over the weekend, rotors looked like they have been swimming in the ocean and brake pads were almost pure copper. Never seen so much copper in a pad. Just had car for 6 months, still wondering what previous owners have been up to lol.
I came over this thread: https://g35driver.com/forums/g35-sed...-grenaded.html
and realizing I have similar issues...". I will be attempting shaking the 3 axles in all directions especially the front diff ends.
There seems to be many low milage propeller axles on ebay or should I stay away from used axles?

 

Ok I found play in passenger side axle. Is CV axle shot or the bearing in the diff shot?
See

 

Probably the axle but it sure does look like the stub shaft is moving.

 

I would check the torque on the axle nut. Stub shaft shouldn't be moving.

 

Good one! Axle nut was nice and snug tho. So it isn't that. I have a feeling front diff side bearing is toast.
I'm taking axle off to get a closer view. Below tools are not able to pop the inner portion of axle.
What tools are you guys using? The one in the middle (an old emergency wrench) was better than the zinked OEM 'axle poppers' tools. However, none of them worked!

 

Once you get something wedged in between the transaxle and the inboard CV joint you just need to pop it a couple times with a small sledge hammer to get that internal snap ring to pop loose.

 

Any update... I just found play, too. All of the other issues are normal wear and tear, but a diff should not fail like this.

 

I found a front diff with less than 60k miles. It is in my laundry room looking at me lol.

 

I was wondering if you unbolted whatever that piece is on the CV input (almost zero room to pop the damn thing out, driver's side is EASY). There's basically no information about these diffs.
I'm curious if there's a bearing hiding behind it like some other diffs...

 

Nvm, I found it on AllData :/

 

I could nit get mine off, byt i think one or two home made L shaped hooks and BFH would do it.
What does alldata say?

 

Found the full thing in FSM. Only the outer race is in the retainer.