Noise from rear diff?

[odie301]

I get this clunking/thudding shuddering sound from my rear end every now and again when i turn corners.(mainly left handers, sounds like the whole rearend shifts underneath the vehicle) I have the factory posi or whatever they consider it. I changed fluid and put in the synthetic that was recommended, i found something on the net about metal spacers or something that go bad with these rear ends?? Anyone had this problem or know how to fix it? I just dont want to have it lock up or shell out going down the road.

If i have to replace the posi, anyone have a recommendation on a good brand besides the stock one? would a detroit locker allow enough wheel spin during corners for road use or would it chirp tires?
by the way this is on a 04 tahoe 5.3l 4x4 if that matters

[YNOT]

no idea what it is but that g80 limited slip posi is common to go out on these 10 bolts.

[puckhead]

stop and park it now! save yourself some money. Just got mine back from the shop and 2 grand. same symptoms as yours

[992door]

what the hell did they put in it was it made of gold

[puckhead]

lol i whish. heres the list: ring and pinion and all bearings, axle seals, had to clean all the metal fragments out of the diff and tubes, ring and pinion gear set, rear end carrier, 3 qts of gear oil, 1 qt posi track fluid, axle seals, plus shop supplies and labor at a discount.

[OKLAGMCRUISER]

have the u-joints been inspected lately?

[Mr.Martin]

Mine did what you explained but I was 20 miles from home so I limped it home and by the time I got home I tore my trans up cause the rear end locked up once and I lost second gear. That ended up makin me drive from NC to WV for a 700 dollar 4L60 then a 1100 bill for my new rear end. My tahoe has the 5.3 with 342 gear so I upgraded to a AAM 4:10 gear (AAM is who GM gets their gears from so either give chevy 600+ for the same brand you can get for under 200 if you hunt around). I went ahead and bought a Detroit trutrack which works great. It's not a full locker so you don't have to worry about anything.

I got the gear, trutrack installed. With all hardware and rebuild kit... I mean everything, complete overhaul for a little under 1100 from a well known shop called Galloways in Richfield, NC.

[odie301]

so is our g80 the same as the eaton g80? what is a good upgrade from this rear end? what i have heard about the eaton g80 sounded pretty good cause it splits torque and can lock up

[Mr.Martin]

get a detroit trutrack

[wmgood64]

i hate it when rearends make noise

[last-442]

Excuse my ignorance but, is the G80 an option code for the posi or is that the model of the rear-end?

Does anyone have a breakdown of what the option codes relate to?

Thanks

[last-442]

Disregard my previous entry, newbie mistake.

Good site for RPO codes: http://www.gm-trucks.com/rpo-code-lookup/

Not that this isn't a good site keep up the good work.