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Discussion Starter #1
maybe paranoid but thats what i got you guys for....

I hear a minor whining noise when accelerating but not too loud and i dont seem to hear it when the windows are down, only up???

how does a bad differential sound? how loud? is it a definate theres a problem noise or just one of those bad louder than normal road noises?

please inform me so i know what to look for...
 

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Ya, my '07 is 8 months old and I watch the garage floor like a hawk. Pathetic.
 

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Cadillac
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maybe paranoid but thats what i got you guys for....

I hear a minor whining noise when accelerating but not too loud and i dont seem to hear it when the windows are down, only up???

how does a bad differential sound? how loud? is it a definate theres a problem noise or just one of those bad louder than normal road noises?

please inform me so i know what to look for...
Sound like any of these TSB's?

04-06-05-002 TSB Rattle/Buzz Type Noise From Under Engine Compartment During Acceleration/Deceleration (Replace Catalytic Converter Bracket Assembly) March 10, 2004


03-01-38-019A TSB Underhood Rattle Noise Heard on Acceleration (Check A/C System Performance and Compressor Operation) September 3, 2004

05-06-01-013 TSB Whine, Whistle, Ringing Type Noise Heard From Front of Engine (Replace Crankshaft Harmonic Balancer) May 3, 2005

05-06-02-009 TSB Engine Hoot, Whine, or Whistle Type Noise at 2200-3000 RPM while Driving, Stationary, or Coming from Front of Dash on Acceleration (Replace Water Pump, Including Thermostat) September 16, 2005

05-06-01-013B TSB Whine, Whistle, Ringing Type Noise Heard from Front of Engine (Replace Crankshaft Harmonic Balancer) March 13, 2006

99-04-20-002D TSB Information on Driveline Clunk Noise When Shifting Between PARK and DRIVE, PARK and REVERSE or DRIVE and REVERSE June 8, 2006

06-03-08-008B TSB Squeak/Creak Type Noise From Front of Vehicle When Braking or Turning (Install Front Lower Control Arm Rear Bushing Spacer) December 20, 2006
 

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Sedan de Ville, CTS
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I talked with a Caddy mechanic and a service writer this past week. Both told me to drive the CTS in reverse and turn the steering wheel (to the right??; I forget the direction.)

If you hear chattering, then you know you have a problem.
 
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Discussion Starter #6
I've been hearing a slight clunk back there when leaving my driveway when the car is cold. No oil yet on the garage floor tho.... I feel like i'm kinda just waiting for it... sad eh?


does it occur when your slowing down to a stop?
 

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2007 Cadillac CTS 3.6L Black, LOADED
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does it occur when your slowing down to a stop?
No. The only time i ever hear/feel anything is making the sharp right turn out my my driveway when the car is cold. Its not really loud, ide say most people wouldnt even notice it, but its there.
 

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2004 Black Raven 3.6L Sport/Luxury
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Right around 40 to 45 MPH you will hear a whine in the rear, I had this and the diff was replaced about a year ago. Last week I had a leak that had to be addressed by the dealer.
 
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