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Discussion Starter #1
I recently started to hear some chattering noises. At first I thought it was a valve, then my mechanic put a few sound probes here and there and he tells me he thinks it's coming from between the transmission and engine. He tells me the engine runs too smoothe for valves and he listend very carefully to the head with this probe he used. The chattering is worse in 1st and 2nd gear or right when I turn on the car. In the rest of the gears you can bearely hear, or hear it at all, until you get on it above 5000rpm. Any suggestions?

Sam
 

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If you have a stock flywheel, its probably bad. If you have an aftermarket one, its normal.

And you never have to worry about the valves, they have enough clearance as to never hit the pistons, even if the timing belt breaks.
 

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Discussion Starter #3
Grant said:
If you have a stock flywheel, its probably bad. If you have an aftermarket one, its normal.

And you never have to worry about the valves, they have enough clearance as to never hit the pistons, even if the timing belt breaks.
If it's bad, I know the stock one is about $900? What should I go with?

Sam
 

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BPUKiller said:


If it's bad, I know the stock one is about $900? What should I go with?

Sam
Stock fllywheel is about $420 from Jeff Watson (how many times is this guy mentioned anyways?!?) at Jay Marks Toyota in Texas. Cool guy, know tons about Supras and is a friend to the Supra community.


The stock flywheel makes noise even when almost brand new. The transmission's first purpose in Supras is not quietness! :)
 
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Yeah , I had my clutch replaced a couple months back and stock flywheel resurfaced.. I heard the noise (rattling) here and there, especially when my AC is running sometimes.. it comes and goes. I notice it more after I run very hard! but even then its sparatic. I was told as well that its just how Supras sound ( very noisy cars ) Before my clutch replacement and having my fly checked out.. that rattle was there about a year and a half. I began to not worry about it because it would come and go. The sound is right under the car, you would think its the tranny but its not. A friend of mine has an aftermarket clutch and I think the factory fly and that rattle is there all the time. I think its the clutch and flywheel combo, either replacement for aftermarket may cause the sound even more. Hope my input was helpful

DI
 

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I have the same noise too. I asked people here earlier and they said it happens more to some cars and less to others so don't worry about it. Its the dual layer type of flywheel we have in our car which makes the noise. So don't worry about it for now, when its time to change your clutch just get a new flywheel and all the goodies to go with the new clutch. Goodluck.
 

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Stock Supra flywheels should never be resurfaced, only replaced. And the stock dual mass flywheel clutch combo is the most quiet of any. The trannies may make a lot of noise but they are known to hold over 700 hp with no worries.
I've been dealing with my rattle-box for a while... :rolleyes:
 

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Discussion Starter #8
theman said:
Stock Supra flywheels should never be resurfaced, only replaced. And the stock dual mass flywheel clutch combo is the most quiet of any. The trannies may make a lot of noise but they are known to hold over 700 hp with no worries.
I've been dealing with my rattle-box for a while... :rolleyes:
This flywheel has been resurfaced twice, well I don't know because it seems somebody changed the original fly wheel without telling me, but that's another story. My only worry is it seems to be coming from the engine in the back, buy the mechanic says he is 90% sure it's from the tranny. There is noise from the top but it's louder under. I will know more saturday when we take it apart.

Sam
 

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Yep, that's where the sound usually comes from. What's going on is since the dual-mass flywheel isn't dampening the vibrations going to the tranny it then gets amplified and broadcast to you ears from the tranny. The stock flywheels are exactly weighted and when they get turned it takes away from the original mass, that's what makes them no good for dampening the noise anymore. Now you may as well go with a TRD twin disk;) you get a lightened flywheel and two sprung hub disks, and from what I hear they're comparatively quiet to the single and the HKS unsprung triple.

Getrag makes their six speed clutch assemblies backwards from normal clutches by using the dual mass flywheels and solid disk, whereas normal clutches like in the RX7 5-speeds are solid flywheel with a srung hub disk. I thought I'd duplicate that with the solid Clutchmasters lightened flywheel and sprung hub RPS single disk but aparently that's not enough dampening.

Sorry this is so wordy long...:cool:
 
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