Differential Moan

GM Lifer · 01-13-2020, 11:35 AM

I've seen people talking about chattering differentials in these forums, but couldn't find a post about moaning. I get a sort of "whoa-whoa" sound the first couple of turns I take after my car's been sitting a while. It goes away pretty quickly. Anyone else heard such a thing? Don't know if I need to do anything about it or not.

crosive · 01-13-2020, 11:49 AM

when I had my ss, it would do this on the first couple of turns when cold (temp cold, not car cold), and would go away.

they flushed the diff and it went away until the next winter, then came back.

it was a reverberative groaning, wasn't mechanical sounding at all. At first I thought it was my subwoofer fading in and out.

Azerlazer26 · 01-13-2020, 12:12 PM

GM released a TSB for this issue. Once I get home I’ll send you the TSB number and what the procedure is

wwiiavfan · 01-13-2020, 12:23 PM

Had the TSB done, it came back. So I just live with it. it goes away pretty quick.

MackSteelPrivateEye · 01-13-2020, 01:19 PM

Quote:

Originally Posted by GM Lifer

I've seen people talking about chattering differentials in these forums, but couldn't find a post about moaning. I get a sort of "whoa-whoa" sound the first couple of turns I take after my car's been sitting a while. It goes away pretty quickly. Anyone else heard such a thing? Don't know if I need to do anything about it or not.

If it goes away then its probably a fluid issue. Maybe they swap it with a new viscosity thickness fluid as a fix.

Azerlazer26 · 01-13-2020, 01:58 PM

OP, here’s the info for the rear diff groan.

GM Lifer · 01-13-2020, 03:04 PM

Thanks!

GM Lifer · 01-13-2020, 05:21 PM

The dealer confirmed they'll fix this for free, provided I get the car in before my extended powertrain warranty runs out at 60,000 miles. I'm in the high 40s right now.

rayhawk · 01-14-2020, 07:36 AM

Well you only get some of the fluid out on the first fluid change, for me the second time seems to have resolved it. I did it myself, not too bad.

Frankie18SS · 01-14-2020, 07:02 PM

Mine sounded like the parking brake was sticking. It wasn't a chatter, definitely a groan. Dealership replaced the diff fluid (he said it was surprisingly dirty considering the car had a few thousand miles on it) and I haven't heard it since. It's put up for the winter but the coldest I've had it out was mid 40's and the read end was still quiet.

Azerlazer26 · 01-14-2020, 07:18 PM

Quote:

Originally Posted by rayhawk

Well you only get some of the fluid out on the first fluid change, for me the second time seems to have resolved it. I did it myself, not too bad.

With you on that. Had to take my car in twice! Never had an issue since

CamaroBody · 01-14-2020, 07:57 PM

this is such an easy diy

I paid $15 for 32oz (now $23) but you really need about 40oz so buy 2
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

.

GM Lifer · 01-15-2020, 09:51 AM

Quote:

Originally Posted by CamaroBody

this is such an easy diy

I paid $15 for 32oz (now $23) but you really need about 40oz so buy 2
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

.

"Easy" if you're not chicken to lift your own car with a floor jack, like I am.

Rock-It Man · 01-15-2020, 03:37 PM

Chattering or snapping is bad, but I guarantee you that moaning when the diff is cold is just a feature of the limited slip design.

Change the fluid but eventually the moan will come back.

01-13-2020, 11:35 AM	#1
GM Lifer Drives: 2016 Camaro SS in Red Hot Join Date: Apr 2016 Location: Mesa, AZ Posts: 275	Differential Moan I've seen people talking about chattering differentials in these forums, but couldn't find a post about moaning. I get a sort of "whoa-whoa" sound the first couple of turns I take after my car's been sitting a while. It goes away pretty quickly. Anyone else heard such a thing? Don't know if I need to do anything about it or not.

01-13-2020, 01:58 PM	#6
Azerlazer26 Drives: 2018 Camaro 2SS Join Date: Jun 2018 Location: Michigan Posts: 613 View My Garage	OP, here’s the info for the rear diff groan. Attached Images

01-14-2020, 07:36 AM	#9
rayhawk Drives: Cadillac CTS-V Join Date: Aug 2008 Location: Miami Posts: 1,065 View My Garage	Well you only get some of the fluid out on the first fluid change, for me the second time seems to have resolved it. I did it myself, not too bad. __________________

01-14-2020, 07:02 PM	#10
Frankie18SS Drives: 18 Camaro 2SS, 07 Saturn Ion Join Date: Apr 2018 Location: North Branch, MI Posts: 339	Mine sounded like the parking brake was sticking. It wasn't a chatter, definitely a groan. Dealership replaced the diff fluid (he said it was surprisingly dirty considering the car had a few thousand miles on it) and I haven't heard it since. It's put up for the winter but the coldest I've had it out was mid 40's and the read end was still quiet. __________________ Ordered from Becky D __ 2018 2SS Silver Ice Redline 6MN, NPP, MRC, GM CAI

01-14-2020, 07:57 PM	#12
CamaroBody Drives: Hyper Blue 2SS Join Date: Jun 2013 Location: CA Posts: 1,163	this is such an easy diy I paid $15 for 32oz (now $23) but you really need about 40oz so buy 2 https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 . __________________ 2SS, Hyper Blue, 8-Speed Automatic, NPP Exhaust, Magnetic Ride Control, Sunroof, Navigation, 5-Spoke Low-Gloss Black Wheels, Black Bowtie Emblems, Cargo Mat/Net Mods: XPEL - Hood, Bumper, Headlights, & Side Mirrors JWM - Side Markers ZL1 Addons - Deluxe Rock Guards & Red Lift Pads GM - Dark Tail Lamps MRR - Gloss Black M017s

01-13-2020, 11:49 AM	#2
crosive Drives: 18 zl1 Join Date: Aug 2017 Location: central alabama Posts: 935	when I had my ss, it would do this on the first couple of turns when cold (temp cold, not car cold), and would go away. they flushed the diff and it went away until the next winter, then came back. it was a reverberative groaning, wasn't mechanical sounding at all. At first I thought it was my subwoofer fading in and out.

01-13-2020, 12:12 PM	#3
Azerlazer26 Drives: 2018 Camaro 2SS Join Date: Jun 2018 Location: Michigan Posts: 613 View My Garage	GM released a TSB for this issue. Once I get home I’ll send you the TSB number and what the procedure is

01-13-2020, 12:23 PM	#4
wwiiavfan Drives: 2017 1SS Hyper Blue Join Date: Apr 2017 Location: Wisconsin Posts: 479	Had the TSB done, it came back. So I just live with it. it goes away pretty quick.

01-13-2020, 03:04 PM	#7
GM Lifer Drives: 2016 Camaro SS in Red Hot Join Date: Apr 2016 Location: Mesa, AZ Posts: 275	Thanks!

01-13-2020, 05:21 PM	#8
GM Lifer Drives: 2016 Camaro SS in Red Hot Join Date: Apr 2016 Location: Mesa, AZ Posts: 275	The dealer confirmed they'll fix this for free, provided I get the car in before my extended powertrain warranty runs out at 60,000 miles. I'm in the high 40s right now.

01-15-2020, 03:37 PM	#14
Rock-It Man 376 cubic inches of fun Drives: 2023 Camaro ZL1 A10 Join Date: Jul 2010 Location: MA Posts: 4,043 View My Garage	Chattering or snapping is bad, but I guarantee you that moaning when the diff is cold is just a feature of the limited slip design. Change the fluid but eventually the moan will come back.

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