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08-12-2008, 01:05 AM | #1 |
Scooby Newbie
Member#: 154007
Join Date: Jul 2007
Chapter/Region:
NWIC
Location: Aloha Oregon
Vehicle:2004 WRX Evo3 16g'D 07 6 speed |
Weird tranny noise with new light flywheel and clutch??
I changed my factory flywheel out with an ACT pro light and then installed a centerforce dual friction clutch. The instant I drove it it felt great however it also instantly started to make tranny noise when I am compressioning down off the gas like either a bad bering noise or sycros just going crazy. As soon as I touch the gas it goes away. 2 days later the centerforce pressure plate exploded so I went to the Exedy stage 2 3 puck disk with matching pressure plate. It still makes the same noise. At first I thought is was the clutch but I now figure the flywheel does it cause it makes the same noise with both clutches. Anyone else have this noise after installing a light flywheel. I hope its only sycros whinning cause of the "less rotating mass" rather than maybe I found a bering problem when I lightened it up?
Any feedback would be appreciated Bryan
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Last edited by chargerbry; 08-12-2008 at 01:12 AM. |
08-12-2008, 04:24 PM | #2 |
Scooby Specialist
Member#: 45494
Join Date: Oct 2003
Location: glen rock, pa
Vehicle:95 impreza L awd green |
It is the flywheel that makes the noise. Live with it or put a heavier wheel back on. It is because the gears have less to keep them loaded.
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08-12-2008, 07:29 PM | #3 |
Scooby Newbie
Member#: 186753
Join Date: Aug 2008
Chapter/Region:
Tri-State
Location: Pennsylvania
Vehicle:2004 Impreza Blue-Grey |
dude, dont be alarmed, i have an act flywheel as well, as well as a stage 2 act clutch, that is currently being replaced (seriously hands are still dirty). It has to be the flywheel, i even dropped my tranny to try and tighten the flywheel, I THOUGHT IT WAS LOOSE. But the torque was correct on all the bolts and it still does it to this day. The transmission was also replaced a year ago, that when all the parts went in, its started to make that soft grind after the new install but trust me... its RIGHT!! It might not be too healthy but its right!
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08-12-2008, 07:36 PM | #4 |
Former Vendor
Member#: 99694
Join Date: Nov 2005
Chapter/Region:
MAIC
Location: 09 SS GTR
Vehicle:2015 rocketbunny brz red |
The cost of doing business with performance parts is a compromise of NVH.
The noises you hear are totally normal. A decrease in mass means a decrease in vibration damping. It's not the flywheel actually making noise, it's the flywheel making the noises that would be there anyway, more apparent. ANY lightweight flywheel will do similar things and make similar noises. Phil |
08-12-2008, 10:17 PM | #5 |
Scooby Newbie
Member#: 154007
Join Date: Jul 2007
Chapter/Region:
NWIC
Location: Aloha Oregon
Vehicle:2004 WRX Evo3 16g'D 07 6 speed |
Thanks everyone. I can live with the noise as long as it's supposed to be there
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08-14-2008, 06:05 PM | #6 |
Scooby Specialist
Member#: 45494
Join Date: Oct 2003
Location: glen rock, pa
Vehicle:95 impreza L awd green |
Oh if you get tranny and engine mounts it will be even louder. To the point you can heard the main shaft spin down when your foot is on the clutch pedal.
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