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Coupes & Convertibles Chevrolet Corvette Chevrolet Corvette Transmission Problems
90 messages, Last post on Oct 26, 2009 at 8:05 PM
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BTW, not only can I hear it, I can feel it too. And after this mornings test drive, I notice bolivar is right about the RPM at the higher gears (5th and 6th). It was happening at the 2000 RPM at 3rd and 4th, so when I heard it in 5th and 6th, I wasnt even looking at the RPM gauge and ASSUMED (not thinking) it was at 2000 RPM...but in those two gears it is much lower RPM then 2000-2,500 range when the sound.vibration begins. Again, I'm not talking just about heavy acceleration here, I'm talking about LIGHT acceleration. And once the noise starts, it stays with me as the RPM's grow. No way "muffler resin" explains this away. This happens before the butterflies open up on my titainium exaust (they open about 3,000 RPM). Also I agree it seems more a rear-end differential issue which makes the most sense. But what about the tranny? It's back there too. I don't know how it is set up back there, but are there U joints back there too? This is a nightmare |
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Replying to: tmerriss (Nov 11, 2007 6:18 am) So it looks like Ray is right-on with his idea of calling around to different dealerships, which it looks like I'll have to do anyway. It's either that, or let the monkeys at my dealership tinker with the unknown (to them) C-6...and I just don''t feel comfortable with that scenario. I'll report back when I know more....
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Replying to: tmerriss (Nov 12, 2007 12:54 pm)
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Replying to: gearup72 (Nov 12, 2007 7:20 pm) |
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Replying to: gearup72 (Nov 12, 2007 7:20 pm) I think the 6 speed is much better, in the sense that the paddle shifters allow substantial additional control. And 6 choices is better than 4. OTOH: I did have a trans. issue in my 2007 A6 - and it appears it may be starting to happen again.... - Ray |
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Update: Well, I called around to a bunch of dealerships in my region. You wouldn't believe the dealerships that really didn't know much about Corvettes. At one dealership that I called, the guy said "no, we don't have a Corvette specialist here, but bring it by", and I replied "do you have anyone who has worked on the C6 Corvette?", and his answer floored me when he said "nope, but we have some mechanics here and they fix all kind of cars. Bring 'er by, and we'll get under there and fix 'er". !!!  Uninspiered, I thanked him for his time, but told him I would pass on his kind offer. Frustrated and running out of pateince (not to mention dealerships), I had only one more to call. This last dealership that I called switched me to a CERTIFIED CORVETTE MECHANIC (finally!), and he immediatly knew what I was talking about, as he worked on several Corvettes! He said there is a service bulletin out on the 07 and 08 Corvettes that call for a rear differential fluid change, as the fluid used in the factory causes a grind sound (like mine!). Also, there is a TSB out for a loose axel bolt thingy (I forget what he said exactly), but in any case, I am to bring my car there. He already thinks it's a differential issue. I asked about the worst case scenerio...the tranny, and what the labor is to replace one. He said the tranny is a 7 hour job, but again, that's the worst case scenerio (fingers crossed it's the differential). It's nice to have some confidence that the person that is working on your car knows what they are doing. I'll report back when I know more. 
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Replying to: tmerriss (Nov 13, 2007 2:01 pm) Punch in the appropriate info. & you'll see all the technical service bulletins for any car any year....2007 Corvette(44 service bulletins), what a disaster.....I was thinking about buying an 08 Vette....I think I'll buy the new 08 Infinity G37(4 service bulletins for the 07 model).... Good luck...
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Replying to: printz (Nov 15, 2007 4:20 pm) |
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Replying to: printz (Nov 15, 2007 4:20 pm)
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Well, I took the car in to the certified corvette specialist, and here is my report: He said there is defenatly an abnormal sound coming from the rear end at certain RPM's. He said because my car is an 08, there isn't any TSB's yet. And he thinks it's either exaust related, or possibly the differential. But looking under the car, he couldn't find anything with the exaust. And since there is no TSB on the car, he doesn't want to drop the differential. So...no joy. he says I have to basically live with it until a TSB comes out. In other words, he did nothing. I am getting no joy from Chevrolet on this whole f******g issue, and I'm really getting angry at this point. Time to re-visit my dealership again. I'll report when I know more.  *A very dissatisfied buyer*
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