Does your engine shudder when going into boost?
Thread Starter
Pro
Joined: May 2015
Posts: 555
Likes: 49
From: Slinger, WI
Yeah, it is BS. No time frame. Said they put it at highest request, sure what ever GM. Get car back and it is in 0-60 mode. Dropped off with 1/2 tank and get back with 3 gallons. This may cost someone their job. I let him drive it for 3 miles and he said something was wrong. There's more, this is small town that doesn't see a A8 ever. I want a new car GM.
Racer
Joined: May 2003
Posts: 498
Likes: 98
From: Vancouver BC
Its not the end of the world here. Hopefully just one issue, one time. My wife's CLK had the cluster replaced 3 times, my CLK ran out of gas at least 3 times on me as they attempted to get it to draw from both halves of the tank. Crap happens, hopefully just once.
Racer
Joined: May 2003
Posts: 498
Likes: 98
From: Vancouver BC
Big Turkey - is your car still good after re-gapping your plugs?
K1600GT - do you have any more details from your dealer on cause / solution of yours?
Will let you know what I learn on mine - so far a bit of a mystery.
Burning Brakes
Joined: Mar 2016
Posts: 1,055
Likes: 269
From: Bucks County PA
I am reluctant to take the car in. I have this feeling that unless something is blown, like a fuse....the dealer isn't capable or inclined to fix it. They are just as likely to drive another Vette from the showroom, confirm the complaint and label it "working as designed".
If I seem jaded, it is because I am. 115k for a car and I have headlights that wobble, a door that rattles to the music and a shudder on light acceleration. Someone joked about avoiding the forum to not read things he didn't know were "wrong" but it's a joke laced with truth.
I just figured it was how the car was, part of the tune...like the wheel skip when turning at low speeds. Guess it isn't but it may as well be for me given the low probability of any dealers actually fixing it.
I still love the car more than I don't but the scoreboard is becoming a tie....
If I seem jaded, it is because I am. 115k for a car and I have headlights that wobble, a door that rattles to the music and a shudder on light acceleration. Someone joked about avoiding the forum to not read things he didn't know were "wrong" but it's a joke laced with truth.
I just figured it was how the car was, part of the tune...like the wheel skip when turning at low speeds. Guess it isn't but it may as well be for me given the low probability of any dealers actually fixing it.
I still love the car more than I don't but the scoreboard is becoming a tie....
Racer
Joined: May 2003
Posts: 498
Likes: 98
From: Vancouver BC
I am reluctant to take the car in. I have this feeling that unless something is blown, like a fuse....the dealer isn't capable or inclined to fix it. They are just as likely to drive another Vette from the showroom, confirm the complaint and label it "working as designed".
If I seem jaded, it is because I am. 115k for a car and I have headlights that wobble, a door that rattles to the music and a shudder on light acceleration. Someone joked about avoiding the forum to not read things he didn't know were "wrong" but it's a joke laced with truth.
I just figured it was how the car was, part of the tune...like the wheel skip when turning at low speeds. Guess it isn't but it may as well be for me given the low probability of any dealers actually fixing it.
I still love the car more than I don't but the scoreboard is becoming a tie....
If I seem jaded, it is because I am. 115k for a car and I have headlights that wobble, a door that rattles to the music and a shudder on light acceleration. Someone joked about avoiding the forum to not read things he didn't know were "wrong" but it's a joke laced with truth.
I just figured it was how the car was, part of the tune...like the wheel skip when turning at low speeds. Guess it isn't but it may as well be for me given the low probability of any dealers actually fixing it.
I still love the car more than I don't but the scoreboard is becoming a tie....
Racer
Joined: May 2003
Posts: 498
Likes: 98
From: Vancouver BC
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Burning Brakes
Joined: Apr 2004
Posts: 849
Likes: 557
From: phx az
I have felt this on mine and several other very low mile A8 Z06s and the one thing they all had in common is that by the time they hit 1000+ miles it was smoothed out to the point of where it was hardly noticeable or not noticeable at all. It appears to be the torque converter lockup clutch wearing in as it only happens when the converter is being applied and trying to get close to zero slip on part throttle acceleration. I personally would do yourself a favor and just drive it to break it in and see how it is in 1000 miles or so before going through the hassle of having anything changed out or dealing with a dealership on something like this.
Last edited by NicD; Apr 21, 2016 at 11:32 AM.
Racer
Joined: May 2003
Posts: 498
Likes: 98
From: Vancouver BC
I have felt this on mine and several other very low mile A8 Z06s and the one thing they all had in common is that by the time they hit 1000+ miles it was smoothed out to the point of where it was hardly noticeable or not noticeable at all. It appears to be the torque converter lockup clutch wearing in as it only happens when the converter is being applied and trying to get close to zero slip on part throttle acceleration. I personally would do yourself a favor and just drive it to break it in and see how it is in 1000 miles or so before going through the hassle of having anything changed out or dealing with a dealership on something like this.
Cruising
Joined: Jan 2016
Posts: 10
Likes: 0
My CTSV with A 8 has had a history ofGM attempts to fix a drive train shudder. They tried numerous things including a TC. Nothing fixed it until they finally replaced the transmission last week. Now the shudder is gone. I wouldn't even let them waste time changing the TC
Racer
Joined: May 2003
Posts: 498
Likes: 98
From: Vancouver BC
Its seems kind of hard to attribute your solution to any one thing... miles?, Haltech?, plugs? - it could be that the TC clutch has just "worn in"? Mine is definitely not getting worse - I "think" its getting better - am prepared to drive it another 500 or 1,000 miles to be sure before they stat swapping out parts.
Racer
Joined: May 2003
Posts: 498
Likes: 98
From: Vancouver BC
i speculate that the dual clutch system in the torque converter is not locking up correctly - i think it is slippage we are feeling. i also speculate that as they wear they may mate better and the problem is reduced or goes away. hopefully someone with more specific knowledge will chime in...
Burning Brakes
Joined: Apr 2004
Posts: 849
Likes: 557
From: phx az
Much like a new clutch in a manual transmission breaks in and gets smoother so does the lockup clutch in the torque converter. These converters aren't like the old style that are designed to just lockup and not slip, these have desired slip targets other than zero which can cause a shudder from time to time. There are converters out there that have legitimate problems, but at least give it some miles to fully break in before dealing with a pain in the *** dealership visit that might be unnecessary.