| 2004-2007 Cadillac CTS-V General Discussion Discuss everything about the first generation Cadillac CTS-V that does NOT fall into either the Performance or Appearance Modification category. | Cadillac Forums: Annoying noise 45mph to 55mph 
10-16-07, 11:37 PM
| | Cadillac Owners Member Cadillac(s): Cadillac CTS-V  | | Join Date: Aug 2007 Location: Brooklyn, NY | | | Annoying noise 45mph to 55mph
I been to the dealer several times for this issues and they keep telling me that its running to factory spec. I get a humming noise or whining noise when driving at 45 to 55 mph while applying light throttle. No throttle I don't hear anything and full throttle it won't hear anything since the engine over powers the noise. Its very irritating when trying to drive at a consistent speed and listening to that noise. If anyone has any ideas please feel free to let me know. |
10-16-07, 11:52 PM
|  | Cadillac Owners Member Cadillac(s): None | | Join Date: Oct 2007 Location: Tulsa, OK | | | Re: Annoying noise 45mph to 55mph
My guess is the 3.73 gears. I can hear a little gear whine from my car in the same mph range.
I have 4.10s in my C5 and the whine is a little louder than on my V and is most noticeable around the same mph range. |
10-17-07, 12:06 AM
| | Cadillac Owners Member Cadillac(s): Cadillac CTS-V | | Join Date: Aug 2007 Location: Brooklyn, NY | | | Re: Annoying noise 45mph to 55mph
Can anything be done to bring the noise down. BTW its an 04 with 50k miles on it. |
10-17-07, 12:13 AM
|  | How YOU doin? Cadillac(s): 2007 SRX (Previously 04 CTS-V) | | Join Date: Dec 2004 Location: Over here. No, not there. | | | Re: Annoying noise 45mph to 55mph
Take the trunk liner out and Dynamat it. Some people have success with changing the fluid in the gears, but it always comes back.
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10-17-07, 12:40 AM
|  | Cadillac Owners Connoisseur Cadillac(s): 2005 Redline CTS-V, 1997 Catera | | Join Date: Mar 2007 Location: Purdue University | | | Re: Annoying noise 45mph to 55mph
I have the same exact noise, its our differential...eventually it will get so bad that the dealer will hear it or it will blow up!
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10-17-07, 01:16 AM
|  | Cadillac Owners Connoisseur Cadillac(s): 2006 INFRARED CTS-V - BADCADY | | Join Date: Jan 2007 Location: Michigan Age: 30 | | | Re: Annoying noise 45mph to 55mph
I got a lil whine in 4th & 5th |
10-17-07, 09:52 AM
| | Cadillac Owners Fanatic Cadillac(s): 2005 Cadillac CTS-V | | | | | Re: Annoying noise 45mph to 55mph
Quote:
Originally Posted by bpm  I been to the dealer several times for this issues and they keep telling me that its running to factory spec. I get a humming noise or whining noise when driving at 45 to 55 mph while applying light throttle. No throttle I don't hear anything and full throttle it won't hear anything since the engine over powers the noise. Its very irritating when trying to drive at a consistent speed and listening to that noise. If anyone has any ideas please feel free to let me know. | Mine did the same (38k on a 05). It was the rear end. Dealer replaced it with an 06/07 version. Hum be gone. |
10-17-07, 10:44 AM
|  | Mods on hold till diff gets fixed. Cadillac(s): 2005 CTS-V | | Join Date: Jan 2005 Location: South Lyon, MI Age: 60 | | | Re: Annoying noise 45mph to 55mph
Quote:
Originally Posted by SkullV ... its our differential... | Quote:
Originally Posted by fredcook ... the rear end. ... | Bingo!
As it gets worse, the range of speeds that you'll hear it will widen.
If you're on warranty still, dealer should replace it with no questions asked ... ABSOLUTELY NO QUESTIONS ASKED! If they resist, go to another dealer.
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'05 CTS-V, Stealth Gray, Sunroof, 3M Clear Bra, B&M Shifter w/UUC Bushings, Specter Werkes Bushings, V Headrests, Wheel To Wheel Powertrain Tune, Corsa, Kooks w/Hi-Flo Cats, Ultimate Grid Pedals, Hotchkis Anti-Sways, STS-V Fogs, Ground Control 650R/600F, WW Clear Sidemarkers, Full-Size Spare, Magnuson SC Polished, CTS Console, FG2, Aggressive Street Alignment, MOMO Shift Knob, DSS/Hendrix Engrg Axles, UUC Flywheel. Soon: UUC MMs. 472 RWHP/411 RWTQ (Mustang dyno). |
10-17-07, 11:45 AM
|  | "gotta get a Wait4Me tune" Cadillac(s): 2009 CTS-V | | Join Date: Aug 2004 Location: SW central PA | | | Re: Annoying noise 45mph to 55mph
Eh... my base CTS did it for 30K miles. The V has had the whine for 35K miles. I always know when I'm going 43 - 45 mph. Haven't replaced a diff yet.
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10-17-07, 07:55 PM
| | Cadillac Owners Member Cadillac(s): Cadillac CTS-V | | Join Date: Aug 2007 Location: Brooklyn, NY | | | Re: Annoying noise 45mph to 55mph
well my rear has been replaced 5 times according to my service record. I guess i have to go back again. |
10-17-07, 10:33 PM
| | Cadillac Owners Fanatic Cadillac(s): 2005 Cadillac CTS-V | | | | | Re: Annoying noise 45mph to 55mph
Quote:
Originally Posted by bpm well my rear has been replaced 5 times according to my service record. I guess i have to go back again. | The question might be... were they replaced with an 04/05 version, or an 06/07 version? They are visually different (there is a comparison picture somewhere on the threads).
I'm not sure, but it seems like most of the dying rears are the older one. I could be wrong. I wonder if anyone has done a poll on that question. |
10-18-07, 01:04 AM
|  | CTS  ader Cadillac(s): 2006 CTS 3.6 // 2005 CTS-V | | Join Date: Dec 2006 Location: an I-294 traffic jam Age: 35 | | | Re: Annoying noise 45mph to 55mph
My rear end whines some, I rub a little Desitin on it and it goes away.
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10-18-07, 03:37 AM
| | Cadillac Owners Connoisseur Cadillac(s): 2005 Redline CTS-V, 1997 Catera | | Join Date: Mar 2007 Location: Purdue University | | | Re: Annoying noise 45mph to 55mph
I would pay 200k for that new camaro if it could do exactly what it does in your sig ! |
10-18-07, 10:02 AM
| | CTS ader Cadillac(s): 2006 CTS 3.6 // 2005 CTS-V | | Join Date: Dec 2006 Location: an I-294 traffic jam Age: 35 | | | Re: Annoying noise 45mph to 55mph
if the camaro could do that, I think it would cost significantly more than $200k |
10-18-07, 02:00 PM
| | Cadillac Owners Connoisseur Cadillac(s): 2005 Redline CTS-V, 1997 Catera | | Join Date: Mar 2007 Location: Purdue University | | | Re: Annoying noise 45mph to 55mph
noone would have to know | | Cadillac Discussion Tools | | | 
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