Noise, clicks, delays in DIfferential - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

PlymouthBarracuda · 09-20-2022, 01:12 AM

Hello, could anybody advise me with my differential issue..

Unusual noise is coming from the diff, dips and delays are felt when releasing throttle and subsequent acceleration.

This constant extraneous noise presents always, but it's best at speeds 40-65 mph, the higher the speed, the higher the pitch of the sound.

Metallic clicks are also often heard when starting off. I checked the CV Axles but no backlash was found. The only play is inside the differential, if you check through the drive shaft..

The dips and delays are very similar to the late operation of the solenoids in the automatic transmission, however, my tranny and TQ are after disassembled full revision, with replaced TCM.

I bought everything but in doubt, do I need something else for diff restoration ? I bought for GM 8.6" IRS and hope it's exactly my diff.

Gear oil ACDELCO 104016 and additive for LSD ACDELCO 104003.

Black_SS10 · 09-20-2022, 07:03 AM

The clicking could be lack of or worn axle washers. Go between the axles and hubs. Literally say anti click on the parts catalog. GM part number is 11611965.

As for the fluid. You can get ac delco fluid with the ls additive. GM part number 89021677

gtstorey · 09-20-2022, 07:37 AM

I don't know that a worn diff is causing "dips and delays". If I remember correctly you have a fairly low mile car?

PlymouthBarracuda · 09-20-2022, 08:32 AM

Quote:

Originally Posted by Black_SS10

The clicking could be lack of or worn axle washers. Go between the axles and hubs. Literally say anti click on the parts catalog. GM part number is 11611965.

As for the fluid. You can get ac delco fluid with the ls additive. GM part number 89021677

Thank you very much ! I replaced left CV Axle 3 month ago with Trakmotive, but clicks returned (maybe diff sound?). By sound, I meant a drawn-out howl, like on old trucks. In my understanding, bearings are collapsed and pinion ring is worn out

PlymouthBarracuda · 09-20-2022, 08:35 AM

Quote:

Originally Posted by gtstorey

I don't know that a worn diff is causing "dips and delays". If I remember correctly you have a fairly low mile car?

No, mileage is 105633. I bought it used, previous owner loved to drift on the track.

Joe.G · 09-20-2022, 10:52 AM

So it appears you have a full rebuild kit coming for the rear along with new gears, Now I am not saying this is your issue or not but if I were you and doing all that you really should rebuild or replace your Differential, they are known to wear, I would install a True Trac ( Which I did in 2 of my vehicles ) or at least a stock type. and 8.6 IRS is correct.

Black_SS10 · 09-20-2022, 11:43 AM

Quote:

Originally Posted by PlymouthBarracuda

Thank you very much ! I replaced left CV Axle 3 month ago with Trakmotive, but clicks returned (maybe diff sound?). By sound, I meant a drawn-out howl, like on old trucks. In my understanding, bearings are collapsed and pinion ring is worn out

Howling is usually pinion bearing related. A full rebuild with a trutrac may be needed.

PlymouthBarracuda · 11-16-2022, 08:26 AM

Quote:

Originally Posted by Black_SS10

Howling is usually pinion bearing related. A full rebuild with a trutrac may be needed.

Replaced 3 bearings, shims, diff main ring and pinion, applied additive Delco 88900330, but no changes in terms of sound. The howling sound from the back of the car remained. It depends only on the speed of movement, but not on pressing the gas pedal.

Maybe you have any thoughts on this case...

PlymouthBarracuda · 11-16-2022, 08:55 AM

There are MEVOTECH H512399 rear wheel hubs in our local store , will try to replace them

RoadRunner70 · 01-14-2023, 08:53 AM

Quote:

Originally Posted by Black_SS10

Howling is usually pinion bearing related. A full rebuild with a trutrac may be needed.

I had the same howling noise constantly at 35-65 mph and replaced differential main ring and pinion.

Now, after replacement, I have the same when throttle is applied only...

Adjustment was done by diff repair station with a dial micrometer.

Any suggestions ?

09-20-2022, 01:12 AM	#1
PlymouthBarracuda Drives: 2011 Chevrolet Camaro SS L99 AT Join Date: Oct 2021 Location: London, UK Posts: 69	Noise, clicks, delays in DIfferential Hello, could anybody advise me with my differential issue.. Unusual noise is coming from the diff, dips and delays are felt when releasing throttle and subsequent acceleration. This constant extraneous noise presents always, but it's best at speeds 40-65 mph, the higher the speed, the higher the pitch of the sound. Metallic clicks are also often heard when starting off. I checked the CV Axles but no backlash was found. The only play is inside the differential, if you check through the drive shaft.. The dips and delays are very similar to the late operation of the solenoids in the automatic transmission, however, my tranny and TQ are after disassembled full revision, with replaced TCM. I bought everything but in doubt, do I need something else for diff restoration ? I bought for GM 8.6" IRS and hope it's exactly my diff. Gear oil ACDELCO 104016 and additive for LSD ACDELCO 104003.

09-20-2022, 07:03 AM	#2
Black_SS10 SomeguyK Drives: 2010 Black 2SS/RS Join Date: Nov 2014 Location: FL Posts: 1,947	The clicking could be lack of or worn axle washers. Go between the axles and hubs. Literally say anti click on the parts catalog. GM part number is 11611965. As for the fluid. You can get ac delco fluid with the ls additive. GM part number 89021677 __________________ TMS 427, Dart iron Block, Forged assembly, Frankenstien heads, AGP TT 62/62 BB turbo's, AGP/Fore triple fuel system, Tilton clutch, Holley 1 7/8 shorties, Technostalgia tail lights,Oracle, Aeroforce, MGW shifter,Flowmaster, Pegasus subframe bushings,BMR trailing & toe arms,Z28 UCA bushings,Zl1 rear sway bar,Prothane,BMR,Goodridge brake lines,Ridetech HQ coilovers,3.91,Trutrac,billet caps,DSS axles,HE offest,built TR6060,1LE diffuser,Havoc spoiler,SSclones,20in MRR 017, Pirelli P Zero, Nitto NT555RII More to come.

09-20-2022, 10:52 AM	#6
Joe.G Drives: 2014 2SS/RS 6SP Ashen Grey Join Date: Aug 2021 Location: NY Posts: 1,262	So it appears you have a full rebuild kit coming for the rear along with new gears, Now I am not saying this is your issue or not but if I were you and doing all that you really should rebuild or replace your Differential, they are known to wear, I would install a True Trac ( Which I did in 2 of my vehicles ) or at least a stock type. and 8.6 IRS is correct. __________________ GM 3.91/TrueTrac OEM ZL1 Rims, Brakes & Side Skirts.ACST4 Splitter/Deflectors NPP M2W,GM Short Throw,Remote Clutch reservoir GPI Ported Rod Mod,BO White PTB,CAI/JRE Scoop, Moroso Catch Can GC Aluminum DS Stainless Works Ceramic LTH/HiFlo Cats SCT X4 Dynosteve, Hotckis 1" Springs & Chassis Max Brace BMR Adjustable Swaybars,Trailing Arms, Adjustable Toe Rod, LCA & Z28 UCA Bushings Hendrix Solid Cradle Bushings Pedders Radius Rod Inserts Strut tower brace Hero Smoked Tail and 3rd Brake Light, Diode Dynamic SL1 Fog Lights AeroForce Dual gauge/Autometer pillar mount.

11-16-2022, 08:55 AM	#9
PlymouthBarracuda Drives: 2011 Chevrolet Camaro SS L99 AT Join Date: Oct 2021 Location: London, UK Posts: 69	There are MEVOTECH H512399 rear wheel hubs in our local store , will try to replace them __________________ 2011 Chevy Camaro SS AT L99 / Stock / Daily Driver 1972 Plymouth Barracuda RB V8 3X2-barrel Holley R-4382A/R-4375A/R-4383A (Hamtramck) / Stock / Weekend Driver

09-20-2022, 07:37 AM	#3
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,143	I don't know that a worn diff is causing "dips and delays". If I remember correctly you have a fairly low mile car?