Noise in rear end when turning at low speed

[doyoulikeithere]

Ok, I'm no expert, but Heres what I have been thinking, And I had a g80 Grenade that made noise and then eventually locked like you, and then eventually after I got stuck in a snowy nightmare, It wouldnt lock at all anymore.
It still drives fine, but has no LS at all, I've pulled it outta the van for spare parts now.

Anyways, in my reading, I heard that the weakest link in these G80 is a small pin. I saw pix of the pin, but dont have the link anymore.
If I recal, it might have the pivoting thing on it, or it might have been some other pin, it was a long time ago. Anyways, they work out of their hole, and eventually wear or break and the thing fails.
During the wearing out period, you'll hear noises from the diff and it wont corner slowly well at all, I guess cuz the pivoting locking thingamabobber isnt doing as it should.
I remember the picture from that thread showing a pin with a knurled end that had wiggled out of its hole just a bit.
Heyfound a quik pic for ya, I think its #11.

Maybe your problem? maybe not, but my

[2 H.B.]

There's a thing that's visible in LeeAnn's photo, that looks like the #11 in the diagram. I remember when I had the cover off I could move it to the right and it had a spring that pushed it back to the left. It's like a 1" cylinder with a cutaway so you can see the spring etc inside it. Kind of in the middle of the photo, just a little higher than center. Is that it?
It sounds like yours just lost the LS and kept working otherwise? That would work for me! Mine will probably blow up instead. Was yours AWD?
The snow here has helped me out, It makes the problem go away, pretty much.

[doyoulikeithere]

That G80 of mine was not witn an awd.
The one in my awd never ever gave me any grief.

Ya the thing on the pin, pivots and makes the diff lock.
Seems that pin can bend, come loose or break.
Loose or bent will make it sticky and not work well.
Broken, well, thats just broken,end of story.

Speaking of broken, dont spin your tire is you get a bit stuck in the sno, it could mean the end of your G80, just like mine.

[Leeann_93]

Sorry - I knew I was supposed to get something from the manuals, but I couldn't remember what or for what thread

1 piece case

2 piece case

[2 H.B.]

Thanks for the diagrams! I'm still trying to figure out how the governor works. Maybe a rebuilt unit would make sense.

[2 H.B.]

Here's am update, if anyone's interested.
I talked to a guy in a local tranny shop, and he said get the stuff from the dealer and do it repeatedly if necessary.


Anyway, what I did after about 1000 miles of no improvement with the GM fluid, was tip the van a little to the left and put a little extra fluid in, since I had about 8 ounces or so left over. I just couldn't bring myself to spend another $80 on fluid, and I figured the extra might help as long as I stayed off the highway. Amazingly enough, it seems to have made a difference, even though the problem isn't gone, it's definitely getting better, now I'm looking for sharp low speed turns instead of avoiding them.

Fortunately, I don't have any highway driving I need to do right now, I'll let it drain on a flat spot to get the level right before I go on any trips.

Thanks for all the help!

[pb3]

hey, curious how you're holding up? have a '04 AWD that had it's encoder motor replaced after driving it for some time without (service AWD lamp). now we're getting a slip-grip from the rear going into parking spots.