differential noise
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3rd Gear
Joined: Jun 2006
Posts: 3
Likes: 0
differential noise
For the past 4000 miles my C6 (2005) has had noises from the differential that have progressively gotten worse. The noises are grinding/rattling at slower turns in either direction and now occur sometimes in driving straight as the car slows or accellerates (clunk). The limited slip occasionally starts to lock on slow turns. I have been to the dealer twice. Both times the fluid was replaced and conditioner added. The dealer insists that it will be better with time. There is now 29000 miles on the car. Has anyone else had unresolved problems? All of the postings seem to indicate replacing the fluid woud fix the problem.
Last edited by longggdriver; Jun 19, 2006 at 10:19 AM.
Le Mans Master
Joined: Nov 2004
Posts: 6,566
Likes: 2
From: Goleta CA
Cruise-In VIII Veteran
Originally Posted by Chevtech
IF the fluid has been replaced there is a bulletin out to replace the diff. clutch packs. PIP3559 is the bulletin number to refer to.
That's what they're supposed to try when the fluid change fails to stop the noise.
Racer
Joined: Nov 2004
Posts: 440
Likes: 0
From: North Potomac Maryland
Should I be upset at my dealer?
The grinding noise on my rear differential was acting up despite the "new fluid fix" I received on my last visit with my C6, so I rescheduled with my selling dealer's service folks. The TSB for this problem indicates that if the replaced gear lube and friction modifier didn't do the trick, both clutch packs have to be replaced.
So I left the car yesterday morning. It took two days to diagnose and fix the car. The problem turns out to be that the tech used the wrong fluid the last time. They added the correct fluid this time, and the grinding went away, without any need to replace the clutch packs.
OK, here's my question. The tech botched the job last time, their service manager confirmed this to me. I had to make two trips to the dealer (to drop off the C6, and to pick it up) and went without my car for 2 full days. [I declined their offer of a cheapo Chevy loaner, and used my motorcycle instead.]
Should I be upset at my dealer? Should the dealer have offered me anything? I'm honestly not sure about this, and welcome your opinions.
So I left the car yesterday morning. It took two days to diagnose and fix the car. The problem turns out to be that the tech used the wrong fluid the last time. They added the correct fluid this time, and the grinding went away, without any need to replace the clutch packs.
OK, here's my question. The tech botched the job last time, their service manager confirmed this to me. I had to make two trips to the dealer (to drop off the C6, and to pick it up) and went without my car for 2 full days. [I declined their offer of a cheapo Chevy loaner, and used my motorcycle instead.]
Should I be upset at my dealer? Should the dealer have offered me anything? I'm honestly not sure about this, and welcome your opinions.
Racer
Joined: May 2006
Posts: 402
Likes: 3
Originally Posted by mdcruiser
The grinding noise on my rear differential was acting up despite the "new fluid fix" I received on my last visit with my C6, so I rescheduled with my selling dealer's service folks. The TSB for this problem indicates that if the replaced gear lube and friction modifier didn't do the trick, both clutch packs have to be replaced.
So I left the car yesterday morning. It took two days to diagnose and fix the car. The problem turns out to be that the tech used the wrong fluid the last time. They added the correct fluid this time, and the grinding went away, without any need to replace the clutch packs.
OK, here's my question. The tech botched the job last time, their service manager confirmed this to me. I had to make two trips to the dealer (to drop off the C6, and to pick it up) and went without my car for 2 full days. [I declined their offer of a cheapo Chevy loaner, and used my motorcycle instead.]
Should I be upset at my dealer? Should the dealer have offered me anything? I'm honestly not sure about this, and welcome your opinions.
So I left the car yesterday morning. It took two days to diagnose and fix the car. The problem turns out to be that the tech used the wrong fluid the last time. They added the correct fluid this time, and the grinding went away, without any need to replace the clutch packs.
OK, here's my question. The tech botched the job last time, their service manager confirmed this to me. I had to make two trips to the dealer (to drop off the C6, and to pick it up) and went without my car for 2 full days. [I declined their offer of a cheapo Chevy loaner, and used my motorcycle instead.]
Should I be upset at my dealer? Should the dealer have offered me anything? I'm honestly not sure about this, and welcome your opinions.
Just so you know the Factory probably won't be paying for the 2nd visit, they aren't going to pay to redo what wasn't done correctly the first time, the shop will most likely eat the repairs.
Last edited by Chevtech; Jun 20, 2006 at 11:39 PM.
Racer
Joined: Nov 2004
Posts: 440
Likes: 0
From: North Potomac Maryland
Chevtech,
Your response is exactly what I expected from my own dealer. That it was not forthcoming is, I guess, pretty eloquent testimony that my dealer does not have the same instinct about customer service as you or me.
Your response is exactly what I expected from my own dealer. That it was not forthcoming is, I guess, pretty eloquent testimony that my dealer does not have the same instinct about customer service as you or me.
Le Mans Master
Joined: Oct 2005
Posts: 6,635
Likes: 0
From: Fallston Maryland
Originally Posted by mdcruiser
Chevtech,
Your response is exactly what I expected from my own dealer. That it was not forthcoming is, I guess, pretty eloquent testimony that my dealer does not have the same instinct about customer service as you or me.
Your response is exactly what I expected from my own dealer. That it was not forthcoming is, I guess, pretty eloquent testimony that my dealer does not have the same instinct about customer service as you or me.
Dan
Race Director
Joined: Nov 2005
Posts: 14,553
Likes: 1,549
From: Supporting the Corvette Community at Abel Chevrolet in Rio Vista, CA 707-374-6317 Ext.123
St. Jude Donor '08
I would at least ask for a couple free oil changes or something due to the PITA it has caused you. some dealers are more apt to try to make it right depending on the service manager. They should have been well aware of the bulletin and it should have been a no-brainer for them.
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