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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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Replying to: tmerriss (Nov 10, 2007 5:28 am) |
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I will ask about the regional service rep, but like you, I hold out little hope that anyone will know what it is. There is no service bulliten out on it for this problem. I still think that a basic look under it and checking for anything loose, plus a fresh flush of the rear end is the way to go. But I will also try this regional service manager. Of course, the noise/feel being there is driving me nuts. I keep going out for a test drive, holding out false hope that I will somehow figure it out this time! It's like I'm helpless so I resort over and over to the only thing I can do on a weekend...keep test driving it. And yeah, I'm not looking forward to the dealership getting it up on a rack. A few years ago I had my C-5 in a few times, and the first time I got it back with a few new scratchs on it. 2nd time it was fingerprints. The 3rd time they actually wrecked the car pulling it out of the bay! I noticed it when I was getting in the car...they didn't even know they wrecked it! I'll tell you this, when the car is in bay...so will I be! I'm going to be in there watching everything. Every dealer should have a Corvette pro. This is ridiculous. |
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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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