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Chevrolet Corvette Transmission Problems

90 messages,  Last post on Oct 26, 2009 at 8:05 PM

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#11 of 90 Re: Paddle shift [motorhead1] by rayainsw Aug 13, 2007 (5:20 am)
Replying to: motorhead1 (Aug 13, 2007 3:40 am) Assuming that this is in reference to a 2006 or 2007 ( you do not specify ) here is my answer & my experience. [ For 2008, GM \ Chevy claims improved shift speed. ]   Short answer: No. GM \ Chevy state that there are both hardware & software upgrades that address the 6L80 shift speed for 2008. I have seen no announcement regarding any sort of ‘retro-fit’ ‘kit’ to improve 2006\7.   I have now driven my 2007 for over 12,000 miles.   I am happy with mine. But not ecstatic. I did test drive 2 2006 A6s. In deference to the final purchaser, I was pretty gentle on the drivetrain. The delay in response ( time from paddle push or pull until initiation of the actual shift ) is too long. [ I am amazed that with so many years to develop this trans., the lag \ pause \ delay is as long as it is. ]   I find the actual upshifts to be typically quick and firm without being harsh.   I see no evidence that there is any attempt to accomplish “rev match on downshift”. At low engine speeds, the torque converter cushions the driveline jolt reasonably well. At higher speeds, the jerk in the shift is much more of an issue. On closed throttle ( foot on the brake ) downshifts are pretty much as I’d expect of a 5 or even a 10 year old design. I find this disappointing.   There has been much speculation that the delay has something to do with trans. ability to live a long & trouble-free life. Torque Mgmt. is often the term I’ve seen. I disagree. The actual shift speed is fine under most circumstances – for me. And I see no way that the delay prior to shift initiation would influence trans. longevity. ( Though I am always willing to be proven wrong. ) Seems logically that the speed & firmness of the shifts would be an issue ( & trans. temps, etc. ) – rather than anything prior. Since the shifts at WOT ( just before redline ) are as quick – and ( apparently ) executed with no delay. . .   Still quite impressed overall with the C6.   Just my 0.02 gallons worth. - Ray Happy – but not quite as happy as I’d hoped to be. Replies to this message: motorhead1 (Aug 13, 2007 9:04 am)
#12 of 90 Re: Paddle shift [rayainsw] by motorhead1 Aug 13, 2007 (9:04 am)
Replying to: rayainsw (Aug 13, 2007 5:20 am) My car is a 2007 with 7500k miles on it. My last Vette was a 2002 C5 with an auto trans which when I hit it hard it would bark the tires in 2nd gear. I know this is not important to some but I am from the old hot rod times when barking the tires was a big thing. I`ll try to grow up. Thanks
#13 of 90 Re: "tire bark" and related issues [motorhead1] by toydriver Aug 13, 2007 (10:22 am)
I'm curious if you can "bark" the tires, in your c6, with traction control off and "competitive driving" mode "on" ??   I just bought my '07 C6; and since I have less than 500mi, I'm not wanting to "test the tires" quite yet. But, I'm anxious. Replies to this message: motorhead1 (Aug 14, 2007 3:30 am) bolivar (Aug 14, 2007 5:10 pm)
#14 of 90 Re: "tire bark" and related issues [toydriver] by motorhead1 Aug 14, 2007 (3:30 am)
Replying to: toydriver (Aug 13, 2007 10:22 am) Yes you can and there is plenty of power to do just that but I would wait until it gets broke in first.
#15 of 90 Re: "tire bark" and related issues [toydriver] by bolivar Aug 14, 2007 (5:10 pm)
Replying to: toydriver (Aug 13, 2007 10:22 am) The tires on my non-Z51 are known for not putting out any 'squeal' at all. The few times I've really jumped on it from a dead stop, I've heard absolutely nothing. But I do think the tires were spinning.   Therefore, I think second gear noise would be even harder to hear.   Just get in your car, go to the nearest intersection, turn right or left and get on it. Be expecting to totally lose control if you give it much throttle. The car will quickly start to slide the rear end. (The car has so much power it will slide before the traction control can kick in.) And if it is sliding, it means the tires are broken loose. And there will be no noise.   If you wreck your Corvette doing this, don't blame me!
#16 of 90 Re: 2007 Coupe Rear Axle Problems [bolivar] by motorhead1 Aug 15, 2007 (3:45 am)
Replying to: bolivar (Aug 08, 2007 9:49 pm) The Chevy dealer changed the oil in the rear end yesterday and said that they couldn`t hear anything now. I will try tomorrow to see for myself. Maybe this fixed the problem.
#17 of 90 Re: 2007 Corvette Transmission Rattle [billw501] by fredolivo Oct 11, 2007 (9:56 am)
Replying to: billw501 (Apr 24, 2007 1:02 pm) Hello billw501, I was experiencing the same problem. I took it in and filed a complaint with the General Motors Engineering Department. I figured that a 90,000 dollar car with this kind of high performance shouldn't be doing that grinding sound out of first gear or any gear for that matter. The mechanics that over looked my car stated that it's due to the molecules of the metal expand and contract from heat and cold transfer which causes a slight grinding sound. Eventually it will stop or not when the vehicle suffers some wear and tear when the transmission settles or better said be broken in. Unfortunetly these are some of the sacrafices we must make to have such an awesome car. Don't worry about it to much, just turn up your music and you won't hear it, thats what i do. WOLF
#18 of 90 Transmission Delay by beachguy Oct 17, 2007 (12:21 pm)
Just purchased an '08 A6. I noticed that the transmission seams to delay before engaging drive more that I am accustomed too when moving the shift lever from N to D. Putting in reverse is no problem. Is this normal for the A6. Replies to this message: rayainsw (Oct 18, 2007 2:43 am)
#19 of 90 Re: Transmission Delay [beachguy] by rayainsw Oct 18, 2007 (2:43 am)
Replying to: beachguy (Oct 17, 2007 12:21 pm) I have not experienced anything like that in my 2007 A6.... Good luck! - Ray Nearing the 15,000 mile mark....
#20 of 90 New '08 Automatic with grinding noise. Tranny? by tmerriss Nov 10, 2007 (5:28 am)
Help!   I bought a beuatiful blue 2008 Vette with the optional titainium exuast, and auto tranny. I notice a grinding sound coming from the rear of the car at around 3000 RPM if I give it slight acceleration in 1st or second. In thrid however, that sound starts at 2500 RPM, and 4th 5th and 6th it starts at 2000 RPM. Again, I can only notice the sound under some acceleration.   I took it to my local dealership where I bought it. I got mixed reactions. The head mechanic says he thinks it's muffler resin (where I have I heard that before?), which seems to be a conviniant way to explain it away. But I know better...this sound is more serious than that. And resin wouldn't act like that at those RPMs. But wait, it get's better...   The salsmen went for a ride and after hearing it claimed that it is a combination of 4 things! He says it is stiff sidewall EMT tires when I accelerate, plus "power transfer" to the rear, plus "lug noise" (for the higher gears), plus some muffler resin! Wow, with those four things working together at once, ANYTHING can be explained away!   Problem is the dealership that I bought it from has NO CORVETTE EXPERTS. In fact, they even admit they never have even tore into a C-6 before!   I think I will need a new tranny (I hate that), but I'm not sure. What should I do? Drive around from dealer to dealer until I happen to come accross someone who knows what they are doing? Or do I just demand that my dealership honor the warenty and replace the tranny? Or mabey it's not the tranny, but I'm just missing something? I don't know what to do...any help is appreciated thanks. Replies to this message: bolivar (Nov 10, 2007 12:28 pm) billw501 (Nov 10, 2007 4:13 pm) jordan0023 (Dec 28, 2007 8:07 pm)

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