2011 cts v rear end whine - ZR-1 Net Registry Forums

Vetman · 03-18-2017

Cts v forum is not very active so I will try with u guys knowing the massive knowledge base. I have a 2011 cts v. Most of the second generation cts v cars have a whine in the rear differential when under very light load between 40 and 65 mph. Differential is german made and can't be repaired. Just replace and usually get the same noise after being hammered a few times. Did the third generation cts v get it corrected and if so will it bolt in?

Also is there an oil which might reduce the whine?

BigJohn · 03-18-2017

Did you try a different gear lubricant?

Top Toy · 03-18-2017

FWIW, my 2010 CTS-V does not whine. Whine is usually due to the gear setup. Would think a good rear end shop could fix that.

Vetman · 03-18-2017

Oil changed. No change. Dealer said they have replaced them under warranty (mine past due) and they say they can not be repaired, just replaced.??? However, will look into rear end shop. A friend of mine has one with the same whine. Have read that many whine. Common criticism of these cars. Love the car otherwise but it may cause me to sell it

03-18-2017	#1
Vetman Join Date: Feb 2013 Location: Yakima Washington Posts: 401	2011 cts v rear end whine Cts v forum is not very active so I will try with u guys knowing the massive knowledge base. I have a 2011 cts v. Most of the second generation cts v cars have a whine in the rear differential when under very light load between 40 and 65 mph. Differential is german made and can't be repaired. Just replace and usually get the same noise after being hammered a few times. Did the third generation cts v get it corrected and if so will it bolt in? Also is there an oil which might reduce the whine? __________________ Jim 1990 Z # 2441 1959 c-1 230 HP 4 speed frost blue/silver 3 owner 2011 cts-v 556 HP, manual 6 speed 1955 chev 2dr ht PP 265 3 speed w/OD Last edited by Vetman; 03-18-2017 at 12:32 AM.

03-18-2017	#2
BigJohn Join Date: Feb 2012 Location: Ledyard,CT Posts: 8,241	Re: 2011 cts v rear end whine Did you try a different gear lubricant?

03-18-2017	#3
Top Toy Join Date: Jul 2012 Location: Allentown, PA Posts: 309	Re: 2011 cts v rear end whine FWIW, my 2010 CTS-V does not whine. Whine is usually due to the gear setup. Would think a good rear end shop could fix that. __________________ '95 ZR-1, aqua/gray, #167 368 LPE/Haibeck, Web cams, Stainless Works headers, B&B Fusion exhaust, 18" Fikse wheels, Alcon brakes, lowered. 491 SAE RWHP.

03-18-2017	#4
Vetman Join Date: Feb 2013 Location: Yakima Washington Posts: 401	Re: 2011 cts v rear end whine Oil changed. No change. Dealer said they have replaced them under warranty (mine past due) and they say they can not be repaired, just replaced.??? However, will look into rear end shop. A friend of mine has one with the same whine. Have read that many whine. Common criticism of these cars. Love the car otherwise but it may cause me to sell it __________________ Jim 1990 Z # 2441 1959 c-1 230 HP 4 speed frost blue/silver 3 owner 2011 cts-v 556 HP, manual 6 speed 1955 chev 2dr ht PP 265 3 speed w/OD

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