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Old 07-03-2017, 11:23 PM   #1
MXSG
 
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Drives: 2016 1SS
Join Date: Aug 2016
Location: Tallahassee, FL
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Loud Squeaking/Scraping Sound from Rear End?

Earlier today I noticed a squeaking metal-on-metal sound coming from the rear of the car. It happens at all speeds and seems to be linked to wheel rotation. It occurs regardless of the brakes being applied or not. Volume is not consistent but it's audible even with the windows up.

Car is a 1SS with 2,200 miles with aftermarket wheels and an exhaust, no other mods. Any ideas before I make an appointment to take it in?
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Old 07-03-2017, 11:24 PM   #2
n813ca
 
Drives: 2106 SS
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It's the normal bad issue

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Old 07-04-2017, 12:19 AM   #3
pieceofchum
 
Drives: 2016 1SS Auto Dual Mode
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Quote:
Originally Posted by n813ca View Post
It's the normal bad issue

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I am about to buy a 2016 Camaro 1SS and I noticed on the Carfax that the car was brought in a bunch of times where the dealer checked the rear differential and axle which concerns me. I didn't notice anything during my test drive but that doesn't mean anything. So what is the "Normal Bad Issue"? How can I check if the car has a problem with the rear diff?
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Old 07-04-2017, 07:50 AM   #4
Codester5
 
Drives: 2016 Camaro SS
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Have differential fluid changed and get dealership to pay for it. I did by threatening the survey when they told me no. I did it 6 months ago and it completely fixed it. I drove it 8 months with that noise and feeling. Even if they say its normal its not right. It can and should be fixed with thefluid change. It'll clear out metal shavings in it that are causing the grind. I credit this forums users for the advice back then and i appreciate you all. We are all a family
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Old 07-05-2017, 08:45 AM   #5
nancygrl
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You say you have aftermarket wheels....correct backspace and offset??? what size tires did you put on?? If the tires are taller and wider than stock you're probably gonna have to relocate a wiring connector behind the rear fender liner (driver side). There's several threads on the subject.
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Old 07-05-2017, 10:13 AM   #6
MXSG
 
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Thanks for the responses. The noise went away yesterday, but if it comes back I'll have the dealer change the differential fluid since that seems to be a common problem based on everything I've been reading.

Wheels and tires should be OK as I have the MRR 1LE replicas that a lot of people are running - I did check my wiring harness again and still no rubbing.
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Old 12-02-2017, 09:35 PM   #7
Nightfall6
 
Drives: 2017 1lt RS Nightfall Gray
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I have the same problem and it does sound like metal-on-metal grinding, and its so damn loud and embarrassing. Happens when accelerating past 1200 rpms.
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Old 12-03-2017, 12:05 PM   #8
Magnum922
 
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Isn't this the positraction clutches that after a few turns they get fresh gear oil in between them and quiet down?
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Old 12-03-2017, 04:18 PM   #9
NJerzeeSS
 
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I have the same issue
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Old 12-12-2017, 06:03 PM   #10
Nightfall6
 
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Turns out the problem I had was an exhaust issue. Theres a bolt on the underside of the resonator and there was a crack there that somehow resonated along with exhaust once it gets up to a certain temp.
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Old 12-12-2017, 10:21 PM   #11
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Quote:
Originally Posted by MXSG View Post
Earlier today I noticed a squeaking metal-on-metal sound coming from the rear of the car. It happens at all speeds and seems to be linked to wheel rotation. It occurs regardless of the brakes being applied or not. Volume is not consistent but it's audible even with the windows up.

Car is a 1SS with 2,200 miles with aftermarket wheels and an exhaust, no other mods. Any ideas before I make an appointment to take it in?
TSB Number:
16-NA-399
NHTSA Number:
10116609
TSB Date:
February 28, 2017
Date Added to File:
August 30, 2017
Failing Component:
Wheels:Lugs/Nuts/Bolts
Summary:
This bulletin advises the service technician of new longer bolts and lock washers required to be installed during repairs that require the half shaft bolts to be removed or replaced.

Quote:
Originally Posted by Marty McFlew View Post
Who has had the this Axle failure?


#16-NA-399: Information on Replacing Half Shaft Fasteners with Revised Parts - (Dec 19, 2016)

Subject:Information on Replacing Half Shaft Fasteners with Revised Parts
CadillacATS-V20162017LF3, LF4, LT1, LT4CTS-V20152017ChevroletCamaro20162017


Involved Region or CountryNorth America and N.A. Export RegionsConditionThe technician may need to perform a repair that requires the half shaft bolts to be removed.
Information

This bulletin advises the Service Technician of new longer bolts and lock washers required to be installed during any repair that requires the half shaft bolts to be removed or replaced.
  • Three retainer assemblies required per half-shaft.
    • Each retainer (3) requires 2 bolts (1) and 2 washers (2) to make a retainer assembly.
    • Where applicable, each axle assembly uses 3 retainer assemblies per side.
    • Each repair kit contains 6 bolts and 6 washers. 1 kit for each half shaft.
    • Replacement of all axle bolts are required during repair.
Correction

If half-shaft has been separated from the differential:
  • Remove and discard only the half shaft bolts.
  • If required, clean and reuse retainers.
  • Replace the shorter bolts (1) with a new longer bolt (2) and washer.
  • Install the lock washers onto the bolts.
  • Install bolt and washer assembly into retainer.
    • Torque bolts to proper torque specifications. Refer to Fastener Specifications in SI.
Service stock half shafts may include POA bolt/retainer assemblies. These assemblies may require rework with longer fasteners.
  • The new half shaft bolts must be removed, measured and discarded if the length is incorrect.
Parts Information[COLOR=brown !important]Note: To obtain the bolts and washers, fax the form included in this bulletin to the GM Warranty Parts Center (WPC). Request WPC #816.

Use the Vehicle Identification Number (VIN), SI, and the GM Electronic Parts Catalog to determine the proper part numbers for the half shaft, if replacement is required:

Bolt/WasherWPC #8161 kit (6 bolts/6 washers)
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Old 12-14-2017, 09:06 PM   #12
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Quote:
Originally Posted by Magnum922 View Post
Isn't this the positraction clutches that after a few turns they get fresh gear oil in between them and quiet down?
Yes its a normal sound real positracks with clutches makes .. No real fix for it.. Other than Whale oil additive ( no longer available ) the synthetic oils just cant get rid of the noise ... nothing wrong with the Positrack otherwise

what happens is the oil drains out of the clutches when its sits.. ( like over night ).. so the first few turns you make the clutches chatter then once you have driven enough and made a few turns in both directions .. sound should diminish because they got some oil in the clutch packs...

When to worry: when it "stops" making that sound .. time for new posi clutches... I know... now your all going to have a panic attacks about not having the sound......

On a less humorous note. DON'T Worry the clutches will last a long time!!!! .....unless you do Idiot burnouts all the time... then nothing can help you .. "stupid is as stupid does" so don't be stupid.... Leave the burn-outs for Funny Car drivers. they are a waist on anything less
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