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I've had this issue for over a year now and I'm getting insanely tired of it. I cannot freaking figure out what is doing it, as I think it's the transmission, but not sure what part of it.
Symptoms:
Entire car vibrates at idle, slightly. Did not do this before and has steadily been getting worse. But doesn't do it all the time which I will go into in one of the other symptoms.
It will vibrate 90% of the time, period. But sometimes the car will drive like it has absolutely no issues. Smooth as silk. But this is very rare.
When accelerating I can feel a slight vibration move from the dead peddle to my accelerator petal, and the opposite when letting off the throttle. I have no idea if that's related, but only noticed after it's been getting worse.
When in MDS operation it vibrates extremely bad. MDS will kick on exactly at 20MPH and vibrate so strongly that it feels like the wheels will shake off. I'm pretty sure it's the torque converter lockup doing this. It will do this in every gear. Vibrates like a son of a bitch. Now, after driving for a mile or so the vibration will almost be gone AS LONG AS YOU DO NOT PRESS THE THROTTLE. The slightest throttle input will make it vibrate. As soon as you turn MDS off it goes away. Driving 20MPH will make it kick on and shake the whole car, the slower I go until about 15MPH the worse it gets. Once it shifts into 1st gear at 15MPH it's fine. The odd thing is if I'm driving 40 and it's vibrating I can press the brake to go slower and it will vibrate worse, then I accelerate slightly it will get EVEN WORSE. It's like once you get down to a certain speed it tries to keep the torque converter going that speed and will fight the acceleration until it disengages from shaking so bad. Sometimes when MDS engages it makes a loud clank noise.
Video, which may or may not help.
http://www.youtube.com/watch?v=0q68RfYccn4
Another odd thing is when driving around with MDS disabled via the manual mode it has these symptoms (MOST OF THE TIME):Car will not coast very well at all. Say I'm going 60MPH down the road, as soon as I let off the gas it feels like I'm being pulled from behind to slow down. Not like a braking action, but like I'm towing something. I've noticed with people in my passenger seat that the second I let off the throttle their heads go slightly forward.
Throttle feels less responsive than it does when MDS is on: When driving in V4 mode, as soon as I press the throttle you can feel instant acceleration, though it vibrates like a mug, it feels a lot smoother than in V8 mode. In V8 mode it feels like it has to slightly spin up then you gradually get going. I can only assume this is the torque converter not locking. Sometimes letting off the throttle will make the car decelerate a very noticeable amount and when pressing on the accelerator it will shudder for a second or two then "bump" then start accelerating. Let's say I'm driving down the road at 60MPH and I let off the throttle, I will notice that I'm decelerating pretty noticeably. 60MPH to 50MPH in a few seconds. I press on the throttle and it shudders for at least 2 seconds then it make a pop feeling, exactly the feeling you get when you downshift, but it doesn't actually switch gears. IT DOES NOT DO THIS WHEN MDS IS ON.
Can some one help me out? I have another torque converter ready to install, just in case, but I don't want to go through all that work just to find out it was something else. I cannot decide if this is the TC or the VB. That shudder thing it does in V8 mode scares me sometimes. I know when I was driving on a slightly icey road it almost wrecked me. When it does the kick, it shoots the power to the wheels instantly breaking them lose.
Sometimes driving in first gear will become unstable. When driving under 10MPH and accelerate it will be hesitant to accelerate. The only way I can describe is that for 1 second of pressing the throttle, nothing happens, then all of a sudden all that lower that would have been in that 1 second acceleration kicks in all at once, jolting the car a little.
What I've done to remedy the problem:
I've drained this transmission at least 3 times and put in a new filter and gasket every time. I never really see metal shaving, sometimes a metal sludge around the magnet. But nothing else.
Changed the dipstick seal.
I've had this issue for over a year now and I'm getting insanely tired of it. I cannot freaking figure out what is doing it, as I think it's the transmission, but not sure what part of it.
Symptoms:
Entire car vibrates at idle, slightly. Did not do this before and has steadily been getting worse. But doesn't do it all the time which I will go into in one of the other symptoms.
It will vibrate 90% of the time, period. But sometimes the car will drive like it has absolutely no issues. Smooth as silk. But this is very rare.
When accelerating I can feel a slight vibration move from the dead peddle to my accelerator petal, and the opposite when letting off the throttle. I have no idea if that's related, but only noticed after it's been getting worse.
When in MDS operation it vibrates extremely bad. MDS will kick on exactly at 20MPH and vibrate so strongly that it feels like the wheels will shake off. I'm pretty sure it's the torque converter lockup doing this. It will do this in every gear. Vibrates like a son of a bitch. Now, after driving for a mile or so the vibration will almost be gone AS LONG AS YOU DO NOT PRESS THE THROTTLE. The slightest throttle input will make it vibrate. As soon as you turn MDS off it goes away. Driving 20MPH will make it kick on and shake the whole car, the slower I go until about 15MPH the worse it gets. Once it shifts into 1st gear at 15MPH it's fine. The odd thing is if I'm driving 40 and it's vibrating I can press the brake to go slower and it will vibrate worse, then I accelerate slightly it will get EVEN WORSE. It's like once you get down to a certain speed it tries to keep the torque converter going that speed and will fight the acceleration until it disengages from shaking so bad. Sometimes when MDS engages it makes a loud clank noise.
Video, which may or may not help.
http://www.youtube.com/watch?v=0q68RfYccn4
Another odd thing is when driving around with MDS disabled via the manual mode it has these symptoms (MOST OF THE TIME):Car will not coast very well at all. Say I'm going 60MPH down the road, as soon as I let off the gas it feels like I'm being pulled from behind to slow down. Not like a braking action, but like I'm towing something. I've noticed with people in my passenger seat that the second I let off the throttle their heads go slightly forward.
Throttle feels less responsive than it does when MDS is on: When driving in V4 mode, as soon as I press the throttle you can feel instant acceleration, though it vibrates like a mug, it feels a lot smoother than in V8 mode. In V8 mode it feels like it has to slightly spin up then you gradually get going. I can only assume this is the torque converter not locking. Sometimes letting off the throttle will make the car decelerate a very noticeable amount and when pressing on the accelerator it will shudder for a second or two then "bump" then start accelerating. Let's say I'm driving down the road at 60MPH and I let off the throttle, I will notice that I'm decelerating pretty noticeably. 60MPH to 50MPH in a few seconds. I press on the throttle and it shudders for at least 2 seconds then it make a pop feeling, exactly the feeling you get when you downshift, but it doesn't actually switch gears. IT DOES NOT DO THIS WHEN MDS IS ON.
Can some one help me out? I have another torque converter ready to install, just in case, but I don't want to go through all that work just to find out it was something else. I cannot decide if this is the TC or the VB. That shudder thing it does in V8 mode scares me sometimes. I know when I was driving on a slightly icey road it almost wrecked me. When it does the kick, it shoots the power to the wheels instantly breaking them lose.
Sometimes driving in first gear will become unstable. When driving under 10MPH and accelerate it will be hesitant to accelerate. The only way I can describe is that for 1 second of pressing the throttle, nothing happens, then all of a sudden all that lower that would have been in that 1 second acceleration kicks in all at once, jolting the car a little.
What I've done to remedy the problem:
I've drained this transmission at least 3 times and put in a new filter and gasket every time. I never really see metal shaving, sometimes a metal sludge around the magnet. But nothing else.
Changed the dipstick seal.