1 - 4 Gears sound normal. No whining or whirring or grinding. Perfect.

However, in 5th gear from speeds 55 and up I hear a very rythmic ta-da, ta-da. Hard to explain. Does not really sound like metal on metal. It is not hihg pitched either.

But it is irritating as hell, and I can not replicate the sounds on stands shifting through gears.

Something rubbing on the driveshaft perhaps at speed? Heat shield rub? I am at a loss and hoping someone in here has a similar experience and can point me in a couple of directions.

I have searched the countless random sound threads and have been unable to identify a thread with my issue at hand.

Thanks in advance for comments.

 

is the sound dependent on throttle input/position? is it less apparent or more apparent under throttle or at constant velocity?

 

^ Seems to not be throttle dependent. More speed dependent. Which I know are kind of hand in hand but the sounds does not increase directly with throttle but does become further noticeable at higher speeds.

 

I think I have this same issue but only in 6th gear and at about 2200 rpm when cruising. I attributed it to my winter tires and rims. I never noticed it before that, at any speed. Have you recently changed tires? Rims? Interested to see others experiences.

 

^

No I have not. Car is an 06 GG SE. Still on stock BBS, tires have 75%+ tread life left.

Another side note - under "hard" braking, I do feel a slight (and I do mean slight) shimmy/vibration on brake pedal.

Do you think a wheel bearing going out could make this noise?

 

^ It's not likely that a wheel bearing would only make noise in one gear. Coincidentally, I am replacing a wheel bearing right now, and also having my front struts rebuilt. Once it's back to together I'll report back to confirm whether the noise is still there.

 

the whine from my transfer case is more noticeable in 5th gear at low rpm when throttle/rpm is matched with speed. i also noticed that the air intake tube also does not have resonators which means somewhere in the powerband, we will notice the pulsation from the air intake. also, low frequency vibration (tire noise) is difficult to attenuate because it bounces off the road and back towards the chassis, from what i understand. I'm new to NVH but i have been doing a lot of research with an NVH related issue at work.

 

I noticed this as soon as I had replaced my worn out stocker tires (03 Evo 8). If I roll down the rear windows when this sound is heard it becomes very loud.

So, at least in my case, this is related to the tires but that can't be the whole story. The noise, since it is louder with the rear windows down, is air buffet - air buffet that does not occur when driving on Avids. The only difference between Avids and most any other tire is the stiffness of the sidewalls. There is, I suggest, some interaction occurring between the car body and the drivetrain by way of the tires.

So, maybe, this problem was never discovered at the Mitsu test track because the mules were riding on the stock tire.

Anyway, I don't see any fix so I am calling this normal.

 

maybe check this out.
watch the video

http://www.lancerregister.com/showth...ghlight=pinion

I'm currently having the same problem with my gearbox. i'm going to be pulling it down soon.

cheers

 

^

Video was unplayable for me for whatever reason...?

Very curious to see it though. It sounds to me almost like a bolt in a tire but much more subtle than that and you dont feel it like you would a bolt in a tire. Man so touch to explain. I would go take video of it but the sounds is so faint the tape would not pick it up.

 

How loud is it with the rear windows down?

 

Obviously difficult to describe a noise, but I have an issue similar. Pull your driveshaft and move your u-joints around by hand to see if they're binding. I'm pretty sure I have mine narrowed down to that. I have one just barely starting to bind up but it's enough to give a rhythmic noise above 75mph or so. I can't hear it in lower gears or lower speeds.

 

^

I put the car up on jack stands the other night and as all over the driveshaft because it was a suspicion of mine as well.

I notice that the rubber components at each joint look a little"tired". I also notice that the beatrus bushings may do me good. The drive shaft has a lot of flex up and down and could easily hit the heat shiels against the chasis or the exhaust.

I am going to remove those heat sheilds and install the bushings and see what happens.

 

I thought the play on mine was excessive too but it really isn't. If you pull your driveshaft, twist your u-joints around with your hand and see if you feel anything binding up at all. Mine was minimal but it fits perfect with my issue (high shaft speed)

 

This sound like a throwout bearing problem. I've replaced all my bushings underneath even tried using different TC and diff oils (AMSOIL)..This started to occur after i had my clutch replaced at AMS.