[p0lar]

OP: you asked for opinions in another thread, and received responses for a few items to examine.

Then, you create another thread about those things to check, and ask if it could be those?

It's just my $0.02, but why bother with the forums until you have more information? If you crawl under the car, you can see the guibo clear as day. Examine it. You could probably also shake a few drivetrain items to see if they clunk or rattle. Report back when you have more a more concrete diagnostic of the problem and someone here is likely to help. As it is, guessing where a mystery clunk originates from behind a monitor under arbitrary circumstances is unlikely to yield a proper assessment of the issue.

Originally Posted by cyberlando

Do I have to drain the diff fluid for this

If you've not drained it before, just do it anyway. It's not expensive.

[cyberlando]

The guibo is in great shape so its not that....I checked everything and all is good!

The only thing I find is that wen my car was on the lift I spun the wheel forward and then quickly backwards and I here a thud sound in the drive shaft area!

There are no vibrations in the cabin while driving

[cyberlando]

I changed the diff fluid less than a month ago.

I'm not trying to throw good fluid if I can just Chang it lose a little then top back up

[p0lar]

Originally Posted by cyberlando

I changed the diff fluid less than a month ago.

I'm not trying to throw good fluid if I can just Chang it lose a little then top back up

There you go then - if you pose a question whose answer you may not like, don't pose the question. Or, that's what I used to tell my mother...

[cyberlando]

I'm asking do I? I'm not sure that when I take the seal out if its gonna be a slow leak or its all gonna just rush out ?