QUOTE(lowkl @ Feb 10 2014, 07:02 PM)
Hi SportyHandling,
Sorry to admit, but I am now getting back the jerking/shuddering. It went away around 5000km (not sure really when) but now at 15000km I am getting jerking/shuddering BUT not all the time.... this is the really weird part.
Every morning, the car performs perfectly, no jerking/shuddering, virtually no grinding... smooth as a Jap car (I am not imagining the comparison, because I also drive my wife's Mazda6). BUT when I go home in the evenings, the problems get progressively worse. Sometimes by late evening, even my wife sitting as a passenger can feel it AND even hear the grinding! WTF la.... so very embarrassing! Then the next morning... ALL OK!
What the....?
I am now switching to S-mode in the evenings to reduce the jerking... this helps. BUT when I do switch back... it's WORSE.
I am monitoring the situation. Most likely when I hit the 20K service in approximately 3 months, I am going to PJ SDAC and insist on the TCM update.
As for the thud sounds, mine sounds different from your description: it is more like the sound of a hollow plastic container that is vibrating/knocking against something. It only happens at very low speed and when the ground is uneven and can really be heard if the car is absolutely quiet. I suspect it could be the excess coolant container, because it is only clipped on on two sides, so can easily vibrate... furthermore, there is a pipe (I think for the air con?) directly below it. Maybe I will follow some suggestions to get some aircon insulation and wedge it in the gap. This is not major issue with me though....
Hi Lowkl,
I appreciate your post. I should mention that jerking/shuddering at low speed with my vehicle is minimal and depends a lot on the footwork. Hence, this is not an issue for me at the moment. However, I take note about the erratic jerking in your vehicle(ie. didn't jerk in the mornings, jerk during evenings) that is getting worse now at 15,000km. Looks like I have to brace for more serious jerking/shuddering when my vehicle is over 10,000km.
In resolving this shuddering at low speeds, so far the TCM update seems to be the easy way out that may or may not resolve the problem. If a TCM update does not resolve the serious judder, maybe a faulty transmission may be the culprit(instead of the commonly reported "It's supposed to be that way"). I've read on Autoworld forum in that one forummer managed to resolve the judder and grinding sound once and for all after some parts of the transmission are replaced (after a series of TCM updates failed to resolve the jerking). If the first step failed to resolve the issue, then we may consider going to the next step..
Yes, most likely we are referring to the same sound in our vehicles with the thud sounds when the car is going up a concrete ramp with grooves. The sound of hollow plastic container(s) knocking against something. It's just a sound that indicates "looseness" and is not very pleasant. Just today I've had my colleagues in my vehicle, and they commented the sound from the suspension is ok and not too loud. Maybe my expectations are higher than them. OVerall the cabin is quiet with low engine sound and vibration. It's only the sound from the suspension that spoils it a bit. But still bearable if one drives slowly on these rough surfaces so that the sound won't be too loud.
Not sure about the excess coolant container or a pipe underneath the car that may be causing the sound.
My service advisor hasn't come back to me on the available replacement part for the faulty clock spring and speaker cover of my vehicle since early last week. I need to give her a call tomorrow to expedite on the order of the parts as I can't tolerate the annoying sound from the steering wheel any longer. The steering wheel makes some noise when it is turned.