Wow, so you have a fresh TRE tranny in there too and still have deceleration noise? then I guess it is just nature of the beast. I was strongly considering a TRE rebuild on my gearbox and/or transfer case.

Let me clarify the "clunk:" basically the clutch will not smoothly engage when i ease out the pedal, it groans and "chudder/chatters." Now I know this is normal for a cold start in wintertime, but I don't feel it's normal on a 50-degree day with some high-speed city and highway mixed driving after the car has more than warmed up.

I'm wondering if the clutch restrictor "pill" is just preventing me from feeling the engagement point properly, and if I should remove it. I have a SS clutch line in. Matt, do you have your clutch restrictor off?

Thanks,
Adam

 

Ahhhh, that "clunk".

Seriously, I know what you are talking about. Not so much a noise, but a feeling as well? If we're on the same page, I feel that is more gearbox related, since I no longer have it with the TRE trans.

As for the SS lines, Brass Bushings, Removing the restrictor - I recommend NONE of it... especially the brass bushings (just wait... remove them before you have to replace you shift cables...yeah i had to).

Keep the restrictor in it - I ran 1.6 60' times with it installed, I see *no* place it hurts the performance. As for the SS line, I don't recommend it as I said, and I have to tell you to go back to stock... although there are people that run it with no adverse effects.

I will be starting another thread about my Stage 1 "upgrade" so stay tuned.

 

Interesting. I get the groaning on engagment, but I don't have any chudder or decel noise. Even when it was 20 degrees I never had an issue with being jerky. The groaning is annoying though. Another weird thing I feel is when I am slowly engaging the clutch I can feel one disk grab then it fully engages.

 

Bleed that slave cylinder - do it thoroughly... it helped my engagement immensely.

 

Well as compelling as Matt's argument is, I'm going to take mine in to get looked at. I changed the tranny fluid last weekend with the hope of quieting things down. Didn't help at all, in fact the drain plug had a fair amount of metal shavings on it even though the fluid was only about a MONTH old and the plug was cleaned off when the Exedy was put in. My decel noise is catastrophic sounding. There is no way there should have been that much metal on the plug in less than 1500 miles. At this rate my tranny will be a pile of dust by 100k.

 

i got ACT and when i engage my clutch and give the car gas it has a weird sound to it i dont know if's the tires or the drivetrain it wasnt like this at first it happen at about 2500 miles my tires are stock and still have alot of meat left. but i do drift in rain and snow so theres wear on the side of my tires help?

 

As far as the noises or characteristics go with the twin disk here are mine -

1. Car in first gear from a dead stop when accelerating acts like it wants to stall if I don't give it more gas than the factory clutch.

2. Decel whining noise is there, almost sounds like a low groaning noise through the transmission when downshifting from any top gear to a lower gear.

3. Rattle/chatter noises are there when clutch pedal is disengaged (i.e pushed in). The noises seem to be getting a little quieter at idle as time/mileage are added to it. However, when I am shifting I get the rattle/chatter when disengaging the clutch between shifts which to me seems alot louded than the chatter noise when at idle.

I am kinda 50/50 on the noise thing, I just turn up the radio a bit to drown 90% of it out. But you guys offer up an excellent explanation and I understand the design issues behind a twin plate. I just wish sometimes the clutch were a little more quiet.

Some people have told me that over time and after about 750-1500 miles of break-in the clutch has quieted down,I will wait to chime in on this.

I guess I prefer the noise damping of the factory clutch over the Exedy, but the clamping and engagement of the Exedy is hands down better than the factory setup. The factory clutch seemed a bit too spongey to me.

After I had the Exedy twin disk installed for whatever reason it's harder to get the transmission into REVERSE only. I life up on the reverse knob, shift to the right, and it's when I try and shift down into reverse that I have to use a bit more force.

I spoke to Buschur Racing about it and David talked to his brother (who does the clutch installs) and apparently the klevis can from time to time need adjustment after the installation.

Anyone else have this problem with REVERSE? And if so, what was your remedy to get it to shift better into REVERSE?

 

I just had the exedy organic installed, with a fidanza flywheel. Now I have heard a supra with an extremely light flywheel, and it makes a LOT more tranny noise, so I was wondering if this decel noise is attributed to the lighter flywheel, do you all have lightened flywheels??? My decel noise is outrageous! When I am in 4th gear, at about 40mph, and I let off the gas, it sounds like it is going to blow up, but it only resonates for so long, then it goes away below a certain speed... so I wonder if it is just from the flywheel...?

 

That is one of the tradeoffs of the lighter flywheel or inadequate dampening in the disc. It doesn't hurt anything, but it can make a racket.

FYI: On the Supra, they are eliminating the dual mass flywheel which normally does the dampening and the disc is rigid, so the noise can be pretty loud. On the other hand, the EVO has more severe torsional vibrations than the Supra because it is a 4 cylinder instead of a 6 cylinder.

The bottom line is to not worry about it hurting anything, and unless you want to change the flywheel, just turn the radio up and drive.

 

Awesome, but yeah you know how it is the first time, scares the **** out of you I thought something was going to fall off, but I am getting used to it now, especially with the benifits, quicker revving, and the car seems fast a **** now.... because the clutch isn't slipping like crazy.