Six Speed Flywheel Help Needed
Thread Starter
Le Mans Master
Joined: Mar 2000
Posts: 9,127
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From: Pottsville, PA. USA Home Of America's Oldest Brewery Yuengling
Six Speed Flywheel Help Needed
I have at work a 1990 Corvette with a six speed the flywheel is bad, The flywheel has lots of play in it which is causing a bad rattling noise when the car is running.
I called the local GM dealer and they tell me GM discontuned the flywheel. Now what are you suppose to do? The part number is 10174482. He also told me that the GM pressure plate is discontuned.
Any suggestions!!!!
I called the local GM dealer and they tell me GM discontuned the flywheel. Now what are you suppose to do? The part number is 10174482. He also told me that the GM pressure plate is discontuned.
Any suggestions!!!!
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Even the producer (Luk) has discontinued the dual mass flywheel. I have seen some threads recently where they have found a few remaining flywheels in stock.
http://forums.corvetteforum.com/c4-g...heel-itch.html
http://forums.corvetteforum.com/c4-g...heel-itch.html
Last edited by STL94LT1; Jul 29, 2009 at 03:22 PM.
Team Owner
Joined: Feb 2006
Posts: 23,133
Likes: 117
From: San Antonio Texas
Look over on Gen. Discussion page
Look over on the "General Discussion" part of the forum for a post (Son of a B-"Dual Mass Flywheel"-itch )
Somebody just went through the same thing and found what you are looking for. Plus there is a poster there that says he has it in stock for cheaper than the $1000+ that is the usual going price.
I don't know whether to jump on this now or wait till I have a disaster of my own!
Somebody just went through the same thing and found what you are looking for. Plus there is a poster there that says he has it in stock for cheaper than the $1000+ that is the usual going price.
I don't know whether to jump on this now or wait till I have a disaster of my own!
Race Director
Joined: Jan 2002
Posts: 12,261
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From: O'Fallon Missouri
Race Director
Joined: Nov 2003
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
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Do a search on the C4 subsection (C4Tech/C4General Discusion). Use flywheel as a keyword for searching titles only. You'll find a few threads on the topic. Opinions vary so I won't give you a short answer.
Team Owner
Joined: Feb 2006
Posts: 23,133
Likes: 117
From: San Antonio Texas
From what I've heard from others that have made the switch to a single mass FW, it is the ZF transmission that makes all the noise. The ZF has huge gears in it and the angles that they are cut make noise when the slack between them is jogged back and forth when coupled to a non-damped flywheel. The dual mass FW acts just like the harmonic damper on the front of the engine and softens the crank shaft pulsations so the gears don't accelerate and decelerate quickly and bang back and forth. Also the engagement and drive-ability of the light weight FWs is said to be somewhat jerky off the line trading smoothness for quick rev-ability. I've heard the super light Aluminum FW's are the worst for noise and the steel ones vary depending on the acoustic tolerance of the driver. Some say it isn't a big deal considering the price difference, and others say it was the worst mistake they ever made and will go back to a dual mass as soon as they can.
(Yeah, I can't decide either
)
(Yeah, I can't decide either
)
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Race Director
Joined: Nov 2003
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
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Oh yeah... One thing I've not seen posted clearly is this:
If you do go for a SMF vs DMF, make sure to use a sprung-hub clutch and heavy steel flywheel if your concern is about noise after the swap. The heavier FW and sprung-hub clutch will maximize the noise dampening and (hopefully) cover most of what the DMF did.
(Carolina clutch is a good resource for conversion to SMF.)
If you do go for a SMF vs DMF, make sure to use a sprung-hub clutch and heavy steel flywheel if your concern is about noise after the swap. The heavier FW and sprung-hub clutch will maximize the noise dampening and (hopefully) cover most of what the DMF did.
(Carolina clutch is a good resource for conversion to SMF.)
Instructor
Joined: Dec 2007
Posts: 202
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From: Carrollton TX
Don't use an aluminum flywheel and you'll be fine. Use a good aftermarket brand steel flywheel and clutch and you'll be happy for the money. I put a fidanza (aluminum) flywheel and centerforce clutch in my LT4 and hated it. Switched to steel flywheel and it was much better. Neither one drove bad but the aluminum one was much noisier. The stock dual mass unit is the best in my opinion because it gives that robust ZF 6 speed a more delicate quality feel.
Racer
Joined: Aug 2002
Posts: 253
Likes: 0
From: Strongsville Ohio
I converted mine to a camaro flywheel 4 or 5 years ago. It is noisy in neutral with the clutch out, but I really like the way the engine revs up. It's been a long time,but I think the DMF weighed around 38 pounds and the Camaro flywheel weighed around 19 lbs. Hence, the fast rev-up.
I also changed to the BMW engine oil, which helped to quiet it down also.
I also changed to the BMW engine oil, which helped to quiet it down also.
Team Owner
Joined: Feb 2006
Posts: 23,133
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From: San Antonio Texas
