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vibration as rpm reaches 3000 rpm

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Old Sep 28, 2006 | 04:54 PM
  #1  
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From: jeddah
Default vibration as rpm reaches 3000 rpm

hi guys i have a question for u,
if I shift slowly from 2ed to 3ed and i reach 4000 rpm and let go my foot of the pedal as my rpm goes down roughly when it reaches 3000 rpm i get a vibration feel in the shifting stick as i can hear the sound of the car changing a lil. How ever its too soft to hear or feel, but if i hardly shift from 2ed to 3ed quickly.. i mean like full rpm 2ed and then 3ed and let my foot off again u can feel the vibration became more rough than b4 and louder and last longer.

note: i think i can feel this on all gears....
all what mentioned below the turbo and the rest of the parts will be mounted on starting from Sat. so i need to know if any 1 thinks its verey searious then i need to stop everything and check this out.
mean while if u think is a loosen thing or a clutch then all of the loosed things r gana b checked and the clutch will b changed.
thank u a lot guys i need ur help big time on this 1.
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Old Sep 28, 2006 | 05:47 PM
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From: Jersey, New
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happens to me, especiially when your letting it rev down after reving up, in gear while movoing. It vibrates 3 or 4 times more than normal around 2900 rpm. Its been confirmed to be normal.
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Old Sep 28, 2006 | 08:27 PM
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I got the samething after APS TT install. Didn't really notice it before the install but I hardly drove it. I'd like to know if its safe too. I found related topics in a search which may suggest it may need a harmonic damper.
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Old Sep 29, 2006 | 01:46 AM
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From: jeddah
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Its been confirmed to be normal.[/QUOTE]
So let me make sure that i got you right... u r saying u asked and its totaly normal
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Old Sep 29, 2006 | 01:50 AM
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From: jeddah
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harmonic damper.[/QUOTE]
no idea what is a harmonic damper if u please explain?
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Old Sep 29, 2006 | 09:18 AM
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My car did'nt have it before when it was NA.. but then a new engine was put in place and TN kit.. i had the same issue.. all gears pretty loud and annoying but as long as it is not a problem then im fine with it.. only thing i worry about is the ECU thinking its knock and puling timing.. any tuning experts know the answer to this?
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Old Sep 29, 2006 | 09:53 AM
  #7  
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From: jeddah
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Originally Posted by LODOSS
My car did'nt have it before when it was NA.. but then a new engine was put in place and TN kit.. i had the same issue.. all gears pretty loud and annoying but as long as it is not a problem then im fine with it.. only thing i worry about is the ECU thinking its knock and puling timing.. any tuning experts know the answer to this?
well i'm still NA but i wont b starting from SAT. i will have a new engine with 3000 k milage and all the crazy stuff that pushes my car to 600 whp so lets just hope that its 1 of the stock parts that r on now and will get fixed once it gets with a performance one unless its a gear thing or a diff coz these r the only tow things that r staying stock on the car.
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Old Sep 29, 2006 | 06:19 PM
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From: Redlands
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Originally Posted by silver nismo
harmonic damper.
no idea what is a harmonic damper if u please explain?[/QUOTE]

http://store.summitracing.com/partde...5&autoview=sku
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