Lightweight Flywheels, & the 3000rpm rumble

Would everyone who has installed a lightweight flywheel post what happened to the 3000rpm rumble, before and after installation.

This is the noise you hear in a manual car as you de-celerate going downhill from 3200rpm to 2800rpm, or so. Not so noticeable on flat ground, where the car does not load up the engine so much.

There is a distinct resonating rumble that comes through most cars, but not all.

Suggestions have been that is from the exhaust, or the driveshaft, or the flywheel.

Today Resist & I drove my car (still standard) then his. (with a TRD lightweight flywheel/clutch)

The rumble is still there at the same revs in his, but it has gone up in pitch. So the crank is still generating harmonics, if it does, and the lighter flywheel plays a
higher note!

But check this out-

http://forum.altezzaclub.org.au/index.php?showtopic=5495

Anyone else??

Keith: I know the resonating Rumble u r talking about. I thought it is related to intake,exhaust system.

my stock IS didnt have that problem, but before I bought my car, Lexus of Brisbnae lended me a demo car(with pod air filter,"Magnum"aftermarket muffler fitted)
The resonating problem was so obvious ~ 3000rpm as u described. ~ 100km/h 6th gear 3000rpm

That's why I was so concerned about getting an aftermarket muffler. but my Remus doesnt have the problem.

not sure why flywheel will change the pitch?

i cant hear the rumble at 3k.. but i cant only coz of the s/c

all memories before i had the s/c have been repressed keith.. sorry

Lol! If only we all were so lucky!!

The rumble is very pronounced on mine (standard factory clutch and dual mass flywheel). Or maybe I'm just very attuned to it!? It’s not just a noise, but also a definite vibration. Very noticeable on smooth seal. It happens when lightly engine breaking down through 3000 rpm on flat road, slight inclines and declines. Have noticed it in gears 3 through 6. The rumble stops as soon as the accelerator or clutch is pressed.

It's most certainly not an exhaust thing - rattling heat shields and exhaust joints tend to be more of a buzzy sound and certainly not a vibration like this, nor is it the boom of induction of the drone of an exhaust.

Have eliminated drive shaft as the cause (has been replaced with minimal effect on the rumble), but it certainly plays a part in resonating the rumble (adjusting the central hanger bearing varies the intensity of the vibration a little). I don’t notice it if I’m chopping quickly down through the gears, but with a more ‘leisurely’ driving style it’s a real nuisance.

With some more info this is looking like it could be a good thread to edit and sticky...

I can't hear any other noises over the resonating from the exhaust.... and theinduction from the turbo.....

I would help, but i cant.

Corey

Yeah, yeah, okay, and I can't hear it over my 1000 W sound system.

Now if we've got all the 'funny' posts out of the way let's leave it for productive comments...

Some discussion on LOC UK

Hey guys

I got my flywheel and clutch in last night, It has definitley caused more of the 3000 rpm sound. Ithink its because the revs are dropping of so quick and the divetrain is loading up the engine under deceleration rather than the rotating mass of the origional flywheel keeping things spinning.

The car is more fun to drive now...certainly more responsive and revs out quicker...should have done it ages ago.

It took me just on 4 hours to do it on jack stands at home + about half an hour to turn up a clutch aligning tool.

...which is now available to anyone who wishes to borrow it while they fit their TRD clutch!!..

yeah, no worries. give me a call 021369360 if you need the aligning tool

My car had no noise at all before i put my clutch in as soon as i installed it there was nothing (as i told you Keith )But maybe didnt hear because i was having so much fun with the new clutch.
I have a very noisy exhaust and in about 3 seconds after talking to keith telling him there was no noise there it was a very significant rumble at 3000 rpm that i could hear over my exhaust...dam..dam...i thought i got away with it..
But hey hoon im with you should have done it along time ago..so now i think i have to get something to support that clutch....supercharger, turbo he.he.he

It is really only noticeable on over-run going slightly downhill, when the diff is driving the engine. On dead level ground it is not intrusive, and uphill I never hear it. (the car slows down quicker)

I think 3rd & 4th are the ones I really hear it in. I have to apologise to passengers the first time they're in the car. A luxury sports sedan that resonates like a rice racer...

I'm glad you like the flywheel Jeremy. Another satisfied customer!!

THIS IS A PLEA!! If anyone has fitted the TRD Kit, pls post your feelings and findings. Any advantages, and disadvantages!! Anything at all.

I am very keen for any response available. Feel free to even PM me if you would rather not comment on the site.
Also pls state WHO fitted your Kit for YOU??

This is very much appreciated.
Regards
Stephen A.

I had mine installed on wednesday..

But only drove it home, chugging around in a SS commodore at the moment
(free car free gas.. )

Will 'bed the clutch in' this weekend and update you

Oh, it was installed by Manukau Toyota, East Tamaki branch, but organised by
Gavin from Manukau branch.

Thanx Squid pls do.

Ok, finally got to drive for longer than 2 minutes today in it.

3000rpm rumble appears to be completely gone, couldn't make it do it at all.
No more clutch shudder at all, and no more 'squeaky cricket sound' when idling.

So I'm Happy with a capital T.R.D.

When Toyota pulled the gearbox out, they found the spigot bearing was worn, so
they replaced it. So I'm hoping thats what fixed the idle rattle, and checking the
old clutch, I found all the rubber 'springs' loose-as, so I reckon thats what the
shudder was.

Just had mine installed...

Mine too needed spigot bearing changed which cost me a day as they couldn't get for 24hrs.

They also had problem with no 5th gear... some foreign object got into the gearbox they reckon

Anyway... will take few days to get used to, but the pedal is light and smooth, no sqeaking noises now... theres small amount of shudder on take off... but i guess that will get less and less...

i have to avoid driving on boost too.. which is not easy!!!!!

interesting how ev1 finds things dif.

I have been talking to few guys lately about everything. I have been talking to Eugene from over at Trade Parts (Exedy) and got some interesting info from him.

With the change of the dual-mass to a solid flywheel you should get effectively no idle cricket chirp (not the case with mine last time it was in), the rattle should virtually disappear. However he does say that because the TRD is so tough, it is build for strangely enough racing you may come across other noises. With the Dual-mass set-up a few of the noises are dulled or illiminated.
The TRD kit has no room for movement in either the Flywheel or the Clutch plate so being able to hear drive-line noises is a standard downside with such a system.
The kit itself does however seem to be quite strong.

I do recommend you dont drop your clutch to much in early stages, wear the clutch in before you go thrashing it. If you do ever remove your kit also dont get to worried if you have burn marks on the flywheel or the pressure plate it is a standard thing with the steel kits!!

My kit is out of the car for a while, I am hoping to get my car back on the road withing next 2 to 3 weeks (with dual-mass) and then see how things go from there. Will let you know if I can pinpoint any real differences between the 2 set-ups (as I seem to be trying both of them several times over).

Hey,

What did you guys pay on your flywheel/clutch group buy ?

is the TRD light flywheel only suitable for Altezza 6MT? (SXE -10)?

or can it be fitted in IS200 6MT (GXE-10)?

SSML,

No As far as I know only Jun makes IS200 Flywheels...And they are not easy to obtain at all...I will be taking to the TRD OEM Manufactorer about making 5-10 Lightweight flywheels for the IS200, stay tuned!!!

Matt =)

OK! I picked up Greeneyes from Paeroa last night after the TRD clutch was fitted.

Now I know its quicker than it was, but I'd just driven Dererk's supercharged Targa car over the Kaimais, and the word "quick" had taken on a different meaning!

Anyway, the clutch is smooth and direct. It picks up within a couple of cm, from "in" to "out", without any shudder like the stock dual mass had. The car accelerates faster, quite noticeably so. All good.

The noise has changed at 3000rpm. I think it covers more rpm , or maybe doesn't need the downhill road to 'drive' it, so i hear it more. But mainly it has lost the drumming that seemed to resonate through the whole car, and is now a higher pitched metallic buzz, more localised. It sounds like a metal plate vibrating on the motor or gearbox.

Whatever it is, it is a lousy advertisement for Toyota and should have been solved before they released the car!

Everyone else fitted theirs??

By GOLLY Keith, I'm surprised to hear that from you.

Does it sound any different to what mine did?

No, very much the same Stephen.

We'll go for a wizz in it sometime & you can compare.

Yours is all quiet now??