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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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41,009 Posts
Ya, my '07 is 8 months old and I watch the garage floor like a hawk. Pathetic.
 

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Registered
Cadillac
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164 Posts
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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4,764 Posts
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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2004 Black Raven 3.6L Sport/Luxury
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834 Posts
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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