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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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My vehicle has 8,600 miles on it. Two weeks ago the rear axle started making grinding/popping noises on the right side, after the car was park over night, once the car started moving forward the grinding noise starts to fade, when park over night the same noise returns. To check your car for these noises do the following. Back vehicle up at lease twenty feet turning steering wheel from left to right listen for the grinding or popping sounds, then drive car forward into a left or right turn remember this is only after the car has been park overnight so this is only for cold starts, if you hear what I have describe your positive traction is going bad. GM has two campaigns out regarding what should be done. First recommendation is to flush axle by changing rear end axle oil, second replace seals and clutches on positive traction. I also recommend to have ABS sensor check and part a describe as a “LINK” The services for the campaigns are free regardless of mileage.
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Replying to: royglosom (Jul 12, 2007 7:04 pm)
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Replying to: motorhead1 (Aug 07, 2007 6:17 am) Chevy has had posi noise for 40 years or more. First thing to try - take the car out and drive it in circles, left and right, or figure eights. This forces the plates in the posi to open up and let the grease in and get it all lubed up. A lot of posi noise can be cured this way. |
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Replying to: bolivar (Aug 07, 2007 9:16 pm)
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Replying to: motorhead1 (Aug 08, 2007 3:52 am) If you want, take it to the dealer. He will drain diff oil and replace it and the additive. They have TSB's telling them about this. If you are really mad and keep at them, they will replace the clutch pack for you. And the new one may be worse..... I'm not going to put my car into the hands of the dealer for such a small problem. You might also be hearing the front tires actually 'scrubbing' on the pavement in the tight turn. Those big tires do not like to be turned at such a sharp angle.
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Replying to: bolivar (Aug 08, 2007 9:49 pm) |
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This is my first 6 speed auto trans in a vette and to tell you the truth I`m a little dissipointed. The shifts in paddle mode are very soft. I`ve tried to shift at different rpms to see if it would shift harder but it`s about the same all of the time. Is there something the dealer can do to make the shift more crisp of do I just have to live with it? Help
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Replying to: motorhead1 (Aug 13, 2007 3:40 am) 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.
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Replying to: rayainsw (Aug 13, 2007 5:20 am) |
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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. 
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