Differential hmming noise? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

king50 · 04-12-2021, 12:13 PM

Hi,
My 2015 camaro has 85k miles on it. I changed the differential oil last month and started to hear humming noise when I turn at low or high speed. The humming noise doesn't happen when I drive straight forward or reverse. The oil I used was 75w-90 UltraPlus GL-5 approved. But it doesn't say limited slip additive on the bottle. So, today I changed the diff. oil. This time, I used the Valvoline 75w-90 with limited slip additive but still hear the humming when I turned. I even rotated the tires but the noise is still present when I turn. Any help diagnosing this issue is appreciated.
Thanks!
Rober

ChibiBlackSheep · 04-12-2021, 12:20 PM

I would grab a bottle of the gm diff additive and throw in 4oz

redcoats1976 · 04-12-2021, 12:39 PM

does the ls camaro have limit slip?i remember reading that manual shift 6 cylinders have limited slip but not sure about this.

CamaroCracka · 04-12-2021, 12:43 PM

that is my understanding. Manual has the 218mm diff and Autos have the 192mm. 218mm is the SS diff and is LSD.

TheFlyingBananaSS · 04-12-2021, 12:52 PM

Did someone say LSD?

gtstorey · 04-12-2021, 02:11 PM

It may take a little while for friction modifier to work it's way into the clutch packs.

BostiPB · 04-13-2021, 11:49 AM

Did you do any low speed figure 8s. You want to do some of them to work the friction modifier into the clutch packs.

Rock-It Man · 04-13-2021, 12:16 PM

Only the manual v6 has a limited slip differential. This information and what fluid to use is of course in the Owners Manual.

Greenhornet2 · 04-15-2021, 07:25 AM

sounds like it could be a wheel bearing. it is louder turning one way

DonM · 04-15-2021, 07:27 AM

I just had a noise coming from the rear that originally I thought was the diff. Turned out as it got louder, I could only hear it from the left rear and it was a wheel bearing.

gtstorey · 04-15-2021, 08:10 AM

Quote:

Originally Posted by DonM

I just had a noise coming from the rear that originally I thought was the diff. Turned out as it got louder, I could only hear it from the left rear and it was a wheel bearing.

Same here. It happened shortly after I installed diff bushings and cover and sounded so much like the diff that I replaced it with a used one. It turned out to be hubs.

king50 · 04-15-2021, 08:58 AM

I don't think that it's a wheel bearing issue because a wheel bearing issue would also make noise when I drove straight. Also, when the engine is cold the grinding noise is loud but as I start driving for 10 minutes the grinding noise becomes softer. The grinding noise only occurs when I turn the steering wheel to the left or right. I did do the 8's pattern at very low speed but it didn't help. Some people told me to put in a bottle of the OEM additive, as after market stuffs aren't nearly as good as the OEM oil. I'll drain the oil and put in the OEM oil and OEM additive as the last resort before I take it into a shop.

Greenhornet2 · 04-15-2021, 10:14 AM

well a wheel bearing doesn't make noise going straight when it first starts to go. it starts making noise on turns as there is excess pressure applied. But since it is louder when cold and if it is making the noise at parking lot speeds on turns I would look at the clutches, add a half a bottle of the gm stuff and see what happens. at high speed the clutches really aren't moving much which is why it sounded more like a wheel bearing.

Avenging Orange · 04-15-2021, 11:43 AM

I've been a firm believer in non synthetic oils for years. Had same issue when I changed to 3.91's. Used the recommended synthetic w/friction modifier and still had noise. Switched to conventional gear oil with friction modifier and it is quiet as a mouse. Actually quieter than the factory gears. Worth a try.

04-12-2021, 12:13 PM	#1
king50 Drives: 2015 camaro ls Join Date: Apr 2021 Location: saint louis Posts: 7	Differential hmming noise? Hi, My 2015 camaro has 85k miles on it. I changed the differential oil last month and started to hear humming noise when I turn at low or high speed. The humming noise doesn't happen when I drive straight forward or reverse. The oil I used was 75w-90 UltraPlus GL-5 approved. But it doesn't say limited slip additive on the bottle. So, today I changed the diff. oil. This time, I used the Valvoline 75w-90 with limited slip additive but still hear the humming when I turned. I even rotated the tires but the noise is still present when I turn. Any help diagnosing this issue is appreciated. Thanks! Rober

04-12-2021, 12:20 PM	#2
ChibiBlackSheep Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012 Location: Southeast, PA Posts: 2,085	I would grab a bottle of the gm diff additive and throw in 4oz __________________ LS3 Crate Engine Swap \| CSP Custom Cam 232/240 .615/.615 113 +3 \| Stainless Power LT Headers \| Z28 Intake \| Borla S-Type Exhaust \| FTI Triple-Disc Billet 3200 Stall 2012 Camaro 2SS/RS \| 1968 Camaro SS \| 2020 Cadillac CT5 Premium Luxury \| 2021 Spark LS

04-12-2021, 12:43 PM	#4
CamaroCracka Drives: 2010 Turbo LS3 Join Date: Dec 2009 Location: Palm Bay, FL Posts: 2,729	that is my understanding. Manual has the 218mm diff and Autos have the 192mm. 218mm is the SS diff and is LSD. __________________ 2010 SS - On3 kit with downpipe cutout, CTR 78/80, CompCam 239/251 620/632 122+4, E85, Z28 suspension and ZL1 diff with Outlaw axles. Gen6 ZL1/1LE brakes. 2011 Vert - 416/w 230/236 .612/.602 115lsa, 1LE suspension w/32mm rear bar. Z28 diff. ZL1 brakes.

04-12-2021, 12:52 PM	#5
TheFlyingBananaSS Evil Genius of Chevrolet Drives: 2017 Z06, 2019 XTS, 2013 SS Join Date: Feb 2017 Location: New York Posts: 3,260	Did someone say LSD? __________________ GPI SS2 VVT cam, ECS Novi 1500 supercharger, Corsa Extreme, Detroit Speed and BMR suspension, Circle D triple disc, Melling oil pump, LS2 chain tensioner, ATI 10% UD, DSX E85 kit, High Energy coils, BTR springs, LS2 Lifter trays, Titanium retainers, hardened push rods, FIC 1000 injectors, ZL1 pump, Mighty Mouse catch can, AEM gauges, Tial BOV, Richmond 3.91 gears, Custom gauge bezels, Speed Engineering headers, Stainless Works HF cats, DSX Aux pump, 710rwhp on E85.

04-13-2021, 11:49 AM	#7
BostiPB Drives: 2014 Camaro 2SS/RS Join Date: Mar 2015 Location: Rockaway, NJ Posts: 129 View My Garage	Did you do any low speed figure 8s. You want to do some of them to work the friction modifier into the clutch packs. __________________ 2014 2SS/RS - Red Rock Metallic - Kooks Headers, Corsa Extreme, Factory Reproductions Z28 Rims, Pedders Coilovers, JDP Clutch Reservoir, Summit Racing Line Lock, GM Strut Brace, GM low profile splash guards, Roto-fab CAI, Oracle Ghosted Sidemarker Lights & Concept Mirrors, ZL1 Side Skirts, MGW Flat Stick Shifter, BMR Subframe Connectors, Eaton Truetrac, Yukon 4.11s, GForce Renegade Axles, Speedmaster79 Diff Cover, Offset Diff Bushings, Every Suspension Bushing Front & Rear Replaced with BMR Poly Bushings - 421HP 412TQ

04-12-2021, 12:39 PM	#3
redcoats1976 Drives: LT W/2LT,blue metallic Join Date: Jul 2016 Location: central florida Posts: 4,915	does the ls camaro have limit slip?i remember reading that manual shift 6 cylinders have limited slip but not sure about this.

04-12-2021, 02:11 PM	#6
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,143	It may take a little while for friction modifier to work it's way into the clutch packs.

04-13-2021, 12:16 PM	#8
Rock-It Man 376 cubic inches of fun Drives: 2023 Camaro ZL1 A10 Join Date: Jul 2010 Location: MA Posts: 4,027 View My Garage	Only the manual v6 has a limited slip differential. This information and what fluid to use is of course in the Owners Manual.

04-15-2021, 07:25 AM	#9
Greenhornet2 Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019 Location: Connecticut Posts: 1,925	sounds like it could be a wheel bearing. it is louder turning one way __________________ Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane

04-15-2021, 07:27 AM	#10
DonM Camaro #4 Drives: 2017-Hyper Blue Metallic-2LTmanual Join Date: Dec 2015 Location: NE Ohio (Akron) Posts: 1,210	I just had a noise coming from the rear that originally I thought was the diff. Turned out as it got louder, I could only hear it from the left rear and it was a wheel bearing. __________________ Don M Supercharged LGX + 6 speed manual = FUN!!

04-15-2021, 08:58 AM	#12
king50 Drives: 2015 camaro ls Join Date: Apr 2021 Location: saint louis Posts: 7	I don't think that it's a wheel bearing issue because a wheel bearing issue would also make noise when I drove straight. Also, when the engine is cold the grinding noise is loud but as I start driving for 10 minutes the grinding noise becomes softer. The grinding noise only occurs when I turn the steering wheel to the left or right. I did do the 8's pattern at very low speed but it didn't help. Some people told me to put in a bottle of the OEM additive, as after market stuffs aren't nearly as good as the OEM oil. I'll drain the oil and put in the OEM oil and OEM additive as the last resort before I take it into a shop.

04-15-2021, 10:14 AM	#13
Greenhornet2 Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019 Location: Connecticut Posts: 1,925	well a wheel bearing doesn't make noise going straight when it first starts to go. it starts making noise on turns as there is excess pressure applied. But since it is louder when cold and if it is making the noise at parking lot speeds on turns I would look at the clutches, add a half a bottle of the gm stuff and see what happens. at high speed the clutches really aren't moving much which is why it sounded more like a wheel bearing. __________________ Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane

04-15-2021, 11:43 AM	#14
Avenging Orange Drives: 2010 Inferno Orange 2SS/RS Join Date: Apr 2010 Location: Clermont, IN Posts: 3,297	I've been a firm believer in non synthetic oils for years. Had same issue when I changed to 3.91's. Used the recommended synthetic w/friction modifier and still had noise. Switched to conventional gear oil with friction modifier and it is quiet as a mouse. Actually quieter than the factory gears. Worth a try. __________________ 2010 Inferno Orange 2SS/RS M6 Black Leather, Sun Roof, OBX Headers, Borla touring axle back, Cold Air Inductions CAI , non synthetic fluids, BMR total bushing upgrade/1" lowering springs, DSE 32mm rear sway bar. GM fe4 shocks/struts/LCA's, AAM 3.91 diff, Vertini RFS1.8 20x9 +30. Conti ExtremeContact Sport 275/35/20. sjm autoprod ABL dash kit. Mike Norris tuned 413/419. Avenging Orange: 43 years of not buying into the Hype........and damn proud of it!! https://youtu.be/9JD9it6SmB8 https://youtu.be/xmelTlEzI34 KICKING CANCERS ASS SINCE 2015!!