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Discussion Starter · #1 ·
Has anyone noticed a sulfur/burning/anti-freeze like smell coming from the rear wheels after you've driven your C7 for a few miles?

I took it to the dealer and the service writer said that it was the normal sulfur smell from the catalytic converter. I spoke to the service manager and he advised he couldn't smell anything. I'm planning on taking it to another dealer. I have had this smell since new and figured it was the new break-in smell but it has over 3600 miles now and it shouldn't be smelling like this. I did check the battery and no leaks. I'm wondering if it could be a problem with the differential. I did have a recall for low fluid during its first few months.
 

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hmmmm.. Have you noticed any fresh road kills lately near where you live.? haha!! Just funnin.
That recall thing sounds like a possible culprit. They may have put an additive in it incase of excessive wear due to the low diff lube. Not sure, just a thought. There is a lot of heat generated back there and that could be the sorce of the smell. Running fine otherwise?
Good luck and hope it is not a serious matter.

STUNG:cool:
 

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Good idea to take it to another dealer. Had to learn the hard way and "fire" two dealers. Now have an outstanding dealership/service departmentment I only take my Corvette to.
 

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Discussion Starter · #4 ·
Thanks for the reply Stung. Yes, it's running fine. It's just the smell that I can live with, but just wanted to make sure it was normal. It seems to me I'm the only one here with that concern ,so I'm planning on taking it to another dealer for a second opinion.
 

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Discussion Starter · #5 ·
Some dealers forget the importance of excellent customer service and how picky we corvette guys/gals can be. Treat us right and we'll keep coming back for more corvettes.
 

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Has anyone noticed a sulfur/burning/anti-freeze like smell coming from the rear wheels after you've driven your C7 for a few miles?

I took it to the dealer and the service writer said that it was the normal sulfur smell from the catalytic converter. I spoke to the service manager and he advised he couldn't smell anything. I'm planning on taking it to another dealer. I have had this smell since new and figured it was the new break-in smell but it has over 3600 miles now and it shouldn't be smelling like this. I did check the battery and no leaks. I'm wondering if it could be a problem with the differential. I did have a recall for low fluid during its first few months.
Hello C7 Crazy,

Please keep us posted after you take your vehicle into the another dealership for a second diagnosis. Also, we'd like to discuss this further and document your concern in our system. If you're interested, you can send me a message on the site!

Andraya
Chevrolet Customer Care
 

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Has anyone noticed a sulfur/burning/anti-freeze like smell coming from the rear wheels after you've driven your C7 for a few miles?

I took it to the dealer and the service writer said that it was the normal sulfur smell from the catalytic converter. I spoke to the service manager and he advised he couldn't smell anything. I'm planning on taking it to another dealer. I have had this smell since new and figured it was the new break-in smell but it has over 3600 miles now and it shouldn't be smelling like this. I did check the battery and no leaks. I'm wondering if it could be a problem with the differential. I did have a recall for low fluid during its first few months.
Is this a Z-51 w/ E-diff, or a base car with standard non-slip diff.? Has the lube level been checked lately?
 

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Discussion Starter · #8 ·
Hello Andraya,

The vehicle was never diagnosed as the smell was just dismissed as being normal. The manager stated he couldn't smell anything when I asked him. I have a good relationship with this dealership and I didn't want to push the matter, but there is a smell compared to my previous corvettes. I am curious to see what another dealer will say and if it has anything to do with the differential because it was among the first Stingrays that was recalled for low fluid. I will definitely reach out to you soon to let you know.

Thank you.
 

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Discussion Starter · #9 ·
Yes. It's a Z-51 w/ E-Diff and the last time the fluid was checked by the dealer was when it was recalled for low fluid almost a year ago.
 

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Did the first service tech. check the car for saved fault codes? I would get that diff. lube level checked again.
 

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I have had 2 incidents where the car was filled with such a smell - seeming to come from rear of car. Took it to a dealer both times. They found nothing wrong. The second time i was actually on my way to the 15 K maintenance appt and i could still catch the smell coming thru the vents by the taillights when i pulled up to the dealer service entrance. I pointed this out to the reception guy at the dealer, who also smelled it. I asked them to check rear diff for leaks. They also checked the brakes, which were fine. They found nothing wrong. I am a little concerned that i might go up in a fireball at some point - no offence GM, but your reputation preceeds you! Has anyone shed light on this issue? Thanks.
 

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It is my experience that differential lubricating fluid can be particularly pungent. Leaking fluid would be my guess.
 
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