Vibration at 2100 rpm
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Joined: May 2003
Posts: 290
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From: Canadian West Coast
Vibration at 2100 rpm I having a hard time tracking down this vibration I have and I need some help.
It starts to develop around 2100 rpm (and stays to 2300, so it a small band) consistently, but it often takes a few seconds to develop once that rpm is reached. It is most prominent in D (3rd) and comes in the form of cycle, changing once a second (pulsating?) - that is, it is strong, then weak, then strong, etc... Sort of like a VVVVVVVvvvvvvvvVVVVVVVVvvvvvvvv pattern, where the big V is where it is strong for a second, and the small v where it is less strong. Occassionally, on certain days, it is much more powerful, rattling the entire dash and console (trans cover) - this happens 1% of the time. It is not prevalent in any other gear or RPM range (and not under WOT).
It didn't develop after any specific mod. It simply appeared about a year ago and has remained ever since. But it has been there through 2 TCs (higher stall each time) and two UD pullies.
I am kind of puzzled right now, not knowing where to start. Could it be an unbalanced DS? Or a Tranny mount problem (at such a narrow rpm range)?
It starts to develop around 2100 rpm (and stays to 2300, so it a small band) consistently, but it often takes a few seconds to develop once that rpm is reached. It is most prominent in D (3rd) and comes in the form of cycle, changing once a second (pulsating?) - that is, it is strong, then weak, then strong, etc... Sort of like a VVVVVVVvvvvvvvvVVVVVVVVvvvvvvvv pattern, where the big V is where it is strong for a second, and the small v where it is less strong. Occassionally, on certain days, it is much more powerful, rattling the entire dash and console (trans cover) - this happens 1% of the time. It is not prevalent in any other gear or RPM range (and not under WOT).
It didn't develop after any specific mod. It simply appeared about a year ago and has remained ever since. But it has been there through 2 TCs (higher stall each time) and two UD pullies.
I am kind of puzzled right now, not knowing where to start. Could it be an unbalanced DS? Or a Tranny mount problem (at such a narrow rpm range)?
