G80 Clunking in left turns ONLY. - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Zabo · 02-17-2011, 12:15 PM

Pretty simple. Clutch in, turn tight to the left and I get a clunking that's light and sounds like the locker is trying to compensate or slip. Heard about a similar issue with 5th gens (non G80 but it's an identical symptom) and the TSB said it was a lubrication/break in issue.

Think this could be the case? Dry spots on the gears causing slippage and the resulting clunk?

robby · 02-22-2011, 07:10 PM

My 02 B4C has done that from new......drove two others just to satisfy myself it was the nature of the beast.
I ordered the car, new, and it only has about 5500 miles now......the sound has never worsened.
I did add the G.M. posi additive just because it has a friction modifier in it.....normally the stuff is only used in clutch type rear ends.
I kinda do it to myself on left turns by shifting to second mid-turn......those moments where the rear end is unloaded is when I hear it, uh, chatter or clank lightly for lack of a better term.

I'd recommend not fretting over it.....just enjoy the car.

BTW, I was reading your story about aquiring the bird.....congrats and sounds like a great find.

Rob

Zabo · 02-22-2011, 07:22 PM

Well an update to this, turns out it's a combination of normal posi noise and the fact that both rear wheel bearings are shot. Up on a lift I got 10* deflection out of both wheels. Needless to say those bearings are done after sitting on the car for 10 years.

8 or so of those probably not even moving wearing a flat spot in the bearing itself.

02-17-2011, 12:15 PM	#1
Zabo Gunning for Sixth Drives: '03 ZR2 Blazer Join Date: Sep 2008 Location: Woodhaven, Michigan Posts: 9,358 View My Garage	G80 Clunking in left turns ONLY. Pretty simple. Clutch in, turn tight to the left and I get a clunking that's light and sounds like the locker is trying to compensate or slip. Heard about a similar issue with 5th gens (non G80 but it's an identical symptom) and the TSB said it was a lubrication/break in issue. Think this could be the case? Dry spots on the gears causing slippage and the resulting clunk?

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02-22-2011, 07:10 PM	#2
robby Drives: 02 B4C 6M Join Date: Mar 2009 Location: Illinois Posts: 69	My 02 B4C has done that from new......drove two others just to satisfy myself it was the nature of the beast. I ordered the car, new, and it only has about 5500 miles now......the sound has never worsened. I did add the G.M. posi additive just because it has a friction modifier in it.....normally the stuff is only used in clutch type rear ends. I kinda do it to myself on left turns by shifting to second mid-turn......those moments where the rear end is unloaded is when I hear it, uh, chatter or clank lightly for lack of a better term. I'd recommend not fretting over it.....just enjoy the car. BTW, I was reading your story about aquiring the bird.....congrats and sounds like a great find. Rob

02-22-2011, 07:22 PM	#3
Zabo Gunning for Sixth Drives: '03 ZR2 Blazer Join Date: Sep 2008 Location: Woodhaven, Michigan Posts: 9,358 View My Garage	Well an update to this, turns out it's a combination of normal posi noise and the fact that both rear wheel bearings are shot. Up on a lift I got 10* deflection out of both wheels. Needless to say those bearings are done after sitting on the car for 10 years. 8 or so of those probably not even moving wearing a flat spot in the bearing itself.