Rattle Noise when Decelerating (Flexplate?)
#1
Rattle Noise when Decelerating (Flexplate?)
Bought a used Evo 4 days ago, wanting to see if this is Transfer case related or just the flywheel.. maybe even an exhaust rattle. Rattle noises coming once I decelerate, goes away when I get back on gas. Doesn't make noise when in neutral or idle. From previous owner, he says it may be the flex plate due to the clutch.
03 Evo 8 with ACT Street Series Clutch, maybe OEM resurfaced flywheel.
Video of what I am hearing. Noise is 0:18. Normal for ACT?
03 Evo 8 with ACT Street Series Clutch, maybe OEM resurfaced flywheel.
Video of what I am hearing. Noise is 0:18. Normal for ACT?
#4
#6
EvoM Community Team Leader
iTrader: (7)
There are many threads about this similar sounding problem. Most commonly from a heavier clutch and pressure plate paired with a lightened flywheel. Nobody truly knows what these sounds are because they require a transmission specialist or removal of drive train parts, which nobody wants to do and rightfully so.
It's either a bad TOB, lightened flywheel chatter, clutch teeth weight noise, etc. Something along those lines.
I had an upgraded Exedy pressure plate and organic disc installed with a resurfaced ACT streetlite flywheel and this noise developed not so long after I had both installed by a normal transmission shop, not a Mitsu speed shop. The sound is annoying AF and is always on deceleration and goes away under even the slightest load. It's never gotten worse but perhaps louder. Never caused mechanical failure as well.
This problem sucks but only proper diagnosis from a trans specialist would help.
It's either a bad TOB, lightened flywheel chatter, clutch teeth weight noise, etc. Something along those lines.
I had an upgraded Exedy pressure plate and organic disc installed with a resurfaced ACT streetlite flywheel and this noise developed not so long after I had both installed by a normal transmission shop, not a Mitsu speed shop. The sound is annoying AF and is always on deceleration and goes away under even the slightest load. It's never gotten worse but perhaps louder. Never caused mechanical failure as well.
This problem sucks but only proper diagnosis from a trans specialist would help.
#8
EvoM Guru
iTrader: (5)
My 9 does the same thing ACT and lightweight flywheel here also. Parts were installed by previous owner I thought the noise was coming from worn driveshaft carrier bushings. Odd that it would be the lightweight flywheel but it's that same rattle on decel. I guess when it comes time for me to change my clutch out I'll swap the OEM flywheel back in.
Thanks for clearing this up.
Thanks for clearing this up.
#9
Evolved Member
iTrader: (3)
My 9 does the same thing ACT and lightweight flywheel here also. Parts were installed by previous owner I thought the noise was coming from worn driveshaft carrier bushings. Odd that it would be the lightweight flywheel but it's that same rattle on decel. I guess when it comes time for me to change my clutch out I'll swap the OEM flywheel back in.
Thanks for clearing this up.
Thanks for clearing this up.
The following users liked this post:
SoSoEVO (Jun 23, 2020)
#10
There are many threads about this similar sounding problem. Most commonly from a heavier clutch and pressure plate paired with a lightened flywheel. Nobody truly knows what these sounds are because they require a transmission specialist or removal of drive train parts, which nobody wants to do and rightfully so.
It's either a bad TOB, lightened flywheel chatter, clutch teeth weight noise, etc. Something along those lines.
I had an upgraded Exedy pressure plate and organic disc installed with a resurfaced ACT streetlite flywheel and this noise developed not so long after I had both installed by a normal transmission shop, not a Mitsu speed shop. The sound is annoying AF and is always on deceleration and goes away under even the slightest load. It's never gotten worse but perhaps louder. Never caused mechanical failure as well.
This problem sucks but only proper diagnosis from a trans specialist would help.
It's either a bad TOB, lightened flywheel chatter, clutch teeth weight noise, etc. Something along those lines.
I had an upgraded Exedy pressure plate and organic disc installed with a resurfaced ACT streetlite flywheel and this noise developed not so long after I had both installed by a normal transmission shop, not a Mitsu speed shop. The sound is annoying AF and is always on deceleration and goes away under even the slightest load. It's never gotten worse but perhaps louder. Never caused mechanical failure as well.
This problem sucks but only proper diagnosis from a trans specialist would help.
-Driveshaft Carrier Bearing Support Bushings (8-Piece Set of 4 Bushings)
https://stmtuned.com/collections/mit...pport-bushings
-DriveShaft Center Support Bushings
https://stmtuned.com/collections/mit...pport-bushings
-Driveshaft Boot Repair Kit
https://stmtuned.com/collections/mit...oot-repair-kit
-Driveshaft Center Bearing Insulator
https://stmtuned.com/collections/mit...ring-insulator
#12
EvoM Guru
iTrader: (12)
I would get he OEM bushings. Since the driveshaft bearing bushings themselves are very compliant and flexible, the solid mount bushings don't really do too much to hold the driveshaft in place. This is the experience I had with solid type bushings, not worth the added cabin noise.
Thread
Thread Starter
Forum
Replies
Last Post
damianhindley
Evo Engine / Turbo / Drivetrain
4
Apr 25, 2011 02:17 PM
AUSS1E
Evo Engine / Turbo / Drivetrain
7
Oct 26, 2007 01:31 PM