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Old 06-05-2013, 08:06 AM   #15
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Quote:
Originally Posted by Al C. View Post
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.


My fluid was changed by the dealership, and when i turn left or right
at about 5mph i hear a whine or humm.
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Old 06-05-2013, 10:43 AM   #16
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Originally Posted by Th3Beast View Post
Correct me if I'm wrong.
Ok

From Chevy's site:

The differential cooler is a truly unique design. This innovative system pumps overcooled transmission fluid to a heat exchanger inside the housing, removing excess heat from the differential fluid
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Old 06-05-2013, 10:53 AM   #17
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I had the same issue, back to the dealer twice, first time the backlash was off, replace ring and pinion, noise went away but came back. Next time they flushed the rearend very good. They think some of the left over lashing compund was causing the whine. It has been quiet ever since and that was about 10,000 miles ago.
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Old 06-05-2013, 03:20 PM   #18
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Quote:
Originally Posted by DangerZL1 View Post
Ok

From Chevy's site:

The differential cooler is a truly unique design. This innovative system pumps overcooled transmission fluid to a heat exchanger inside the housing, removing excess heat from the differential fluid
Wait a minute... I'm a little confused on that. So the differential fluid is not getting pumped to the front of the car?
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Old 06-05-2013, 04:09 PM   #19
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Originally Posted by Th3Beast View Post
Wait a minute... I'm a little confused on that. So the differential fluid is not getting pumped to the front of the car?
Correct...its trans fluid that goes back to the rear diff and picks up some heat off the center section and housing
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Old 06-05-2013, 04:11 PM   #20
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No. ATF is the meduim used for cooling. Otherwise the system would take more than around 2 qts of fluid to do a rear differential fluid service. I also wonder how well gear oil would circulate, especially compared to a thinner trans fluid.
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Old 06-14-2013, 10:05 PM   #21
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Old 07-09-2014, 12:08 PM   #22
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My 2013 ZL1 is in the shop now. They drained and flushed the differential 3 times but the noise is still there. I was told they're contacting Detroit to see what the next step is. They've had it for 3 days now. I really miss my ride.
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Old 07-09-2014, 05:18 PM   #23
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Originally Posted by BigguyBri View Post
My 2013 ZL1 is in the shop now. They drained and flushed the differential 3 times but the noise is still there. I was told they're contacting Detroit to see what the next step is. They've had it for 3 days now. I really miss my ride.
Make sure that your ZL1 was driven for 20 miles between each differential fluid change. My dealer doesn't take my ride off the lot unless I'm aboard, so I put the 60 miles on it and the problem cleared.

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Old 07-21-2014, 02:26 AM   #24
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Originally Posted by Jamesdman24 View Post
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!!!
Does it happen while at a cruising speed as well?

My 2013 was doing it on turns and it was noticeable at cursing speeds. When I acc/dec it would go away but while maintaining a speed I could hear it.

Took it to the dealer and they rebuilt the rear end. I've heard of others getting a new rear end for the same issue.
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Old 02-22-2016, 03:02 PM   #25
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I had mine changed within 30 days of owning. (Tulsa, America) It did work, but 60K miles later it is back. Now they are saying that they want me to pay 600.00. Ha the dealer and GM can kiss my ass. Put the old shit back in and I will go Buy a Ford!!!! Divorces are really very easy these days...
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Old 02-22-2016, 09:23 PM   #26
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Change your fluid yourself. $40
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Old 02-22-2016, 10:35 PM   #27
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Originally Posted by fonegod View Post
I had mine changed within 30 days of owning. (Tulsa, America) It did work, but 60K miles later it is back. Now they are saying that they want me to pay 600.00. Ha the dealer and GM can kiss my ass. Put the old shit back in and I will go Buy a Ford!!!! Divorces are really very easy these days...
600 to change the rear diff fluid ? they did mine and it was like 150 canadian
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