06-02-2013, 10:28 PM | #1 |
Drives: 1969 camaro, soon 2012 ZL1 camaro Join Date: May 2012
Location: Scotia, ny
Posts: 6
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ZL1 Rear end noise
I have a 2012 ZL1. The rear end makes this weird humming noise, similar to the sound when your power steering is low, coming from the rear when the wheels are cranked in either reverse or forward. Any help would be great!!!
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06-03-2013, 04:13 AM | #2 |
Drives: 01 WS6 Join Date: Jun 2009
Location: Texas
Posts: 263
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Same here when she is cold. Once heated up it goes away! 2013 ZL1
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2013 Red ZL1 Auto modded
2015 C7 ZO6 Luguna Blue stock |
06-03-2013, 08:00 AM | #3 | |
Drives: 2012 Camaro ZL-1 SIM Join Date: Sep 2008
Location: San Antonio, TX
Posts: 454
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Quote:
Since then, I haven't had the sound reappear. I think GM should look at extending the TSB to officially support the ZL1 as well.
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06-03-2013, 10:49 PM | #4 |
Drives: Customer's Projects Join Date: Feb 2013
Location: Des Moines
Posts: 10
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theres a private bulletin for the zl1's. Calls to flush the fluid about 3 times and in between those drive it so many miles doing so many figure 8's and a lot of nonsense, all in all majority of the time they are replacing the whole rear end, and when you get it supose to take apart the cover and brake clean inside to get the paint off. The paint they used inside on the gear in the differential to set it, isn't breaking down like its supose to contaminating the lsd.
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Karl Performance
Des Moines, IA AWD Chassis dyno EFI Tuning |
06-04-2013, 12:33 AM | #5 | |
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Quote:
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Laus Deo
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06-04-2013, 11:16 AM | #6 |
Drives: 2013 Camaro ZL1 Join Date: Jun 2013
Location: Long Beach, CA.
Posts: 33
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Im interesyed in thos also. I also notice some sort of loud winning noise espesially in 4yh or 5th gear. Dont recall as im giving it gas.
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HRE Monoblocks 20inch wheels, Roto-fab CAI, ZL1 Borla S-type, tinted windows
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06-04-2013, 11:32 AM | #7 |
Drives: ZL1 #529 "El-Jefe" Join Date: Mar 2012
Location: Las Vegas, NV
Posts: 668
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Just change the fluid, it will go away! takes 20 mins to do. you have to get the diff fluid with ls additive already in it.
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06-04-2013, 12:00 PM | #8 |
Drives: 2023 Black ZL1 Auto Join Date: Oct 2009
Location: FEMA Region 4
Posts: 2,935
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May not be related to the fluid issue. Could be improper lash setup in the rear. Changing fluid will not help this problem.
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06-04-2013, 12:23 PM | #9 |
Drives: 2017 SS 1LE Join Date: Feb 2013
Location: Riverview, FL
Posts: 278
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06-04-2013, 12:34 PM | #10 |
Mid-Florida Camaro Club
Drives: 2019 ZL1 on Order Join Date: Jan 2011
Location: Heathrow, FL
Posts: 3,136
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I had this issue, dealer changed out the fluid and the problem went away.
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06-04-2013, 01:42 PM | #11 | |
Drives: ZL1 #529 "El-Jefe" Join Date: Mar 2012
Location: Las Vegas, NV
Posts: 668
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Quote:
I just drained at the diff, and filled at the upper plug, noise stopped. If you feel draining at the diff is not good enough and want to get the lines and cooler drained, take it to the dealer. Im sure they use some sort of positive feed pump, but i dont think thats needed. |
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06-04-2013, 04:49 PM | #12 |
Drives: 2023 Black ZL1 Auto Join Date: Oct 2009
Location: FEMA Region 4
Posts: 2,935
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Draining the lines and cooler would have no effect on the noise. The cooler is running transmission fluid and doesn't mix with the rear diff fluid.
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06-04-2013, 10:31 PM | #13 |
Drives: 1969 camaro, soon 2012 ZL1 camaro Join Date: May 2012
Location: Scotia, ny
Posts: 6
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Thanks guys. Sounds like my dealership is changing my fluid!!!
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06-05-2013, 07:46 AM | #14 |
Drives: 2017 SS 1LE Join Date: Feb 2013
Location: Riverview, FL
Posts: 278
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Correct me if I'm wrong, but if there is a feed and return line going from the diff to the front of the car and ran thru a heat exchanger, than there will be old gear fluid in those lines and hx unless flushed.
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