My old 5.0 mustang did the same exact thing and by applying a little clutch pressure...it removed the noise as well.
Hopefully its just a minor adjustment in need for the EVO clutch.

For what its worth...I ran into another EVO owner today at a car show. We chatted for a good few hours about our rides. He also has the decel noise at 1100 miles.

 

Bump

 

Well I'm going in for the 2nd time. Its grinding into 5th gear AGIAN! And the clunking from 1-2-3 is back. I thought the 1st time was a fluke. But WTF. I'm not a happy EVO owner.

 

Tha sucks man, when did you go in the first time and what did they do???


I have my meeting with the regional rep today. When I get home today I'm gonna start a new deceleration noise thread so look for updates to my case there..

 

Dude, I know the feeling. I just got my car back on Friday. Same grinding going into 5th. The ********* at the dealer had my car for 15 days waiting for the parts to come from .
They replaced everything associated with 5th gear.
But now no more noise. The trans is flawless, at least through the weekend.
Smoked a Boxter Saturday

 

I think I have found what ONE of the decel noises I am expierencing was...It does not cure the BRR BRR BRR/Gear whine/decel grind sound I am getting, but it did remove one of the vibrating/heat shield type noises that I was expierencing.
I was installing my new PWR radiator this weekend and had to remove the under garmet from the car, when I discovered this...

- Jack the front of the car up

- Remove the CENTER under garmet piece (remove the 989834 plastic clips)

- Look directly in the middle where the rear portion of the plastic under garmet connects to the frame. There is a piece of metal that is attached to the frame and its only held in by those plastic screws.

- If you shake this metal piece you can see that is will move around a good 1/2 inch or so, and its only purpose I believe is to connect the rear portion of the plastic facia to the frame.

I will take a picture of it if I can borrow the digi camera from my work. Anyone who has today off should try it =)

Again, it did not fix the Grinding Decel noise I still get, it only fixed a metal/heatshielf vibration sound that I was getting.

 

Well I had my meeting with the regional rep yesterday.

First off, he is nice reasonable guy and an automotive engineer. From our conversation, Mitsubishi engineers in Japan are very much aware of the decel noise and they are very sure that it's source is the transmission. They also are very firm in the opinion that there is nothing that can be done about the noise and that it is an enherant characteristic of the tranny.

I did show him the tsb from honda and he agreed to pass it along to engineering. I don't think that they have considered a clutch disk redesign up to this point.

We drove my car and another evo off the lot and though my noise did seem more prevalent than the other car, both made the same noise under the same conditions.

The bad news is the dealers have no recourse with this issue right now. Engineering says thats how it should be so there is nothing the dealers can do.

So until we can get a lot more folks to call there dealers, as well as america, nothing is going to happen with this issue. They need a lot of folks to call in and complain about this before engineering will attempt to find a solution.

If anyone has tried a different clutch disk and found that it reduced the noise or eliminated it we may have somethign to take back to them as proof that the issue can be addressed.

 

The decel noise concern was brought up with Rhys Millen at this past weekend SoCal meet. Since he's spent hundreds of hours behind many EVO's his opinion was asked. He said it was normal and a characteristic trait of the EVO. When he first heard the noise years ago he was also like " what's that noise?"
He says it's really loud in his rally car without the insulation.
When asked if the noise would lead to something breaking down, he said no. So take that for what it's worth....

 

Once again it IS normal. Most heavy duty trannys I've had make more noise. I have the decel noise and from day one I thought nothing of it. To me it's not loud or even really noticable unless I really pay attention. I understand there are people with other tranny issues..but for those with some decel noise there is no need to worry. A first gear low speed whining is also normal.

 

I wish someone had asked him if any of the clutch disks he had tired over the years made it better or worse. In the case of the decel noise on the S2000's honda was able to significantly reduce the volume of the noise by redesigning the clutch disk.

Again, my point here is even if something is "normal" that does not always mean it is "right".

 

The topic of clutch disk did come up with Rhys, but nothing to add in relation to the decel noise. From his impressions the noise was normal. Some of us wanted to know about the clutch he has available and if it was streetable. According to him the clutch they have is a sprung 6 puck disk that's comfortable to drive on the street.

 

I called them last night to ask about the disk, Blair mentioned that it might be a little too grabby for a daily driver (thats not modded to hell and back). He also mentioned that they could get a different version that has a full face instead fo the six puck design. He said the full face design would be a little tammer than the six puck..... for what its worth.

 

So any word from if they have a solutions for the noise?

 

You should see how many other people might have the same noise and if you could it'd be nice to take pics and put it up in the HOW TO section.. not that it is perhaps hard (not from what you've said) however.. it would be great as a FUTURE reference (don't you think?) for those who might come across with a similar problem in the future and be asking around about it. Just sounded like a good idea? What you all think?

Question... I'm not fully up to par on clutches.. but wouldn't a full faced clutch be more grabber becuase of the greater surface area of the clutch in comparision to the 6 puck spring clutch that's in the EVO already? Inherently making the full faced clutch more grabbier? I'm confused.. someone care to fill me in or give me some breakdown 101 to make me understand?

Jay

 

so what's the real deal with the tranny...I have some whining and clunking when shifting as well...is it just the differentials locking in or is it a factory defect..I noticed the clutch or bearings making a slight noise, i haven't had a 6 puck clutch before do they make more noise than a normal one??