Ok, just recently i started noticing a very slight whine. This is the same one that that every one hears during light acceleration in first gear. But this sound is heard in the other gears as well 2-5th. It does not get any louder but a little higher in pitch with increase in speed. The noise does go away when I put in neutral and coast. Its mostly heard when maintaining speed or engine braking, but its not noticeable or as much during acceleration in the higher gears. Also this whining or more like a similar to tires howling sound sort of seems like its pulsaing a little as well.

I started noticing this a week ago after a did a launch in which I didnt slip too much but did have the tires break loose and ended with some wheel hop. It's possible that this sound was already there but I just didnt notice it until the next morning after launching.

I do have the Blox roll stopper mount in which I installed 2-3 weeks ago. Would this cause the transmission noises to be heard more? This sound could have been there before but I didnt notice this until after the wheel hop launch.

I dont think its the transfer case because it does become unnoticeable when I coast in neutral. Any one know what it could be or suggestions?

Thanks,

 

I forgot to mention, I did also install the Buschur shifter Bushings. Both underhood and shifter. Thought I'd mention, maybe it transfers some of the transmission noises?

Ok, here are my thoughts...

I dont think its the throw out bearing because it does not make that noise when I rev the motor when in neutral or clutch pressed in/out. Unless the throwout bearing is making these sounds when it has load for what ever reason?

Also I dont think its the wheel bearings because of the same reason of when I put it in neutral. I also tried some really hard turns to see if it would cause any sound changes..

Any thoughts...?

 

i had smth similar. sometimes i cant hear it at all. i say relax, drive the car, enjoy it and see what happens. evos make noises we just have to live with them.

 

put it in the air and have someone make the noise and you go under and see where it is coming from. i had a noise like that come from my transmission. i broke a good amount of teeth off first gear and they where stuck in the bearings

 

if you have just done a timing belt and installed it too tight it will whine... but you didnt say anything about doing a timing belt soo i was just throwing that out there anyway

 

Thanks for the replies/suggestions guys.

Currently only modifications I have done to the car are in my signature.

I guess I will have to put it on jack stands and go under the car to pin point the sound.

 

I think that is my issue, what are potential problems that can result from this? Ill get this checked out ASAP

 

When's the last time you changed your tranny fluids? For me, the shifter getting notchier or slightly more noise from the drivetrain have always meant that it was time to change the fluids. I'd change the tranny, tcase and rear diff and then see if the noise got better.

l8r)

 

I changed the transmission fluid with Amsoil and transfer case with OEM in June when I changed the clutch. I've been lazy to change the rear diff fluid, but at the moment I have 27k miles and last I changed the rear diff I had 15k.

The sound sounds like its coming from the front. Cant pin point it exactly, but I dont think its the normal drivetrain sound that Evo's have.

 

Just curious, how many miles have you put on the car since June?

If you want to swing by Oswego, you can compare your transmission noise to mine. Mine's pretty quiet until about 60 mph, when all hell breaks loose due to my solid mount rear diff.

l8r)

 

Hell no I'm driving that far lol.

Since June I probably put about 3k miles. I put about 12,000 miles a year on my car. Bought it new in April 2007 with 4 miles on it and now I have 27,XXX miles.


Today I check it out with my friend and we both concluded that its not normal transmission sound. He is a Ford, Mazda, Subaru tech and is used to the noisy transmissions of the STI's.

Here is the thing we found that the resonate sweet spot is around 55 mph. The noise is almost completely gone when I put it in neutral and coast. A very faint slight whine can be heard but only if your listening really hard during neutral coasting. And during acceleration its gone but returns during cruising throttle or decel in gear.

Since the sound pulsates and is heard during the above mentioned moments we are guessing maybe it has something to do with the final drive gear. I dont think its the transfer case because from all the descriptions of the tc and video clips those whine consistantly when rolling no matter in gear or not.

 

Bump

So many people have different kinds of whines. Are your windows up or down when on the highway? If they're up, can you still hear the sound clearly with the windows down?

I have a whine in first gear and in second it quiets down. Just today on the highway I had noticed a VERY faint whine in 5th gear around 75-80mph. Only with very light throttle. Off the throttle, it goes away completley. It's quiet enough that if I tried to take a video of it, I don't think you could hear it.

I normally drive with my windows down and I've never heard this. I can only hear it with the windows up because it's that faint. I heard it once before but never gave it a second thought until today because I was on the highway for about an hour. I had more time to think about it.

Unless it sounds like this http://www.youtube.com/watch?v=TXbis...eature=related I don't think you have anything to worry about. Mine is nothing close to that.

Evo's whining at low speeds is 100% normal. Both of my Evo's have done it and any Evo I've ridden in has done it. My old evo had absoltuly no whine above 35mph. Just the normal low speed whine. My new Evo has a loud first gear, but I know it's the gear it's self not the t-case, because if I'm slowing down in second and slide the shifter into first gear at about 5mph, I can hear the gear itself "weee, beh bee beh bee"... haha pardon my impression. It's hard to actually spell it out. Similar to a car going in reverse, but ONLY first gear. Second is a little noisy, but no noisier than my previous Evo or any other Evo.

The highway whine is what I'm a slightly concerned about. I noticed it awhile ago when I had my windows up but I didn't really care at that time. Just thought "ehh whatever, normal drivetrain whine". Today, I had my windows up on the highway because it's a little cool outside and I was on the highway for about an hour, so I had more time to really think about the sound. Only VERY light throttle at about 70-80mph. And it's not annoying or loud, but it was enough to make me think.

I'm not convinced yet that I have a serious issue. I've heard from reputable Evo/DSM trans experts that some whine is totally normal. But like I said, if it sounds like you have a straight cut dogbox... well, you have a problem.

I've heard people talk about clutch or throw-out bearing noise. I'm familiar with the rattle sound of either the TOB or pilot bushing can make when at a stop in neautral with the clutch pedal out, but I've never experienced clutch or TOB whine.

I do think little noise is ok. But, when your car starts to sound like the video I posted, start saving some money.

 

I guess mine is very similar to yours. I dont hear it with the window down because its that faint. At 35 mph it doesnt exist until around 45 then at 55-65 its most audible then higher its even less loud.

Its weird though because it only makes this sound during keeping speed/decel in gear. It wont do it when I'm accelerating.

Oh and its nothing like that siron sound from the transfer case going bad in that clip. Mine is more like that 1st gear whine but at the same time the sound but pulsating/oscilating.

And yes I am well aware of the noisey drivetrains we have. I also have that 1st gear sound and is almost non existant in 2nd and completely gone in 3rd +. But this noise just started. Plus, remember I'm running a quiet exhaust system so all small changes I can hear.

 

I did more searching and found that an excessively noisey first gear can mean it has cracked teeth! Yikes... My first gear in this Evo is louder than my previous evo, but I'm not sure if it's excessively noisy. I'm used to it. It will start to whine when I'm slowing and push it into first gear at about 5mph. I hate the sound it makes. It drives 100% though. A little lock-out into second occasionally, but I think that's more clutch adjustment related.

Evo's and their damn drivetrain noises and problems make me paranoid Figures the part of the car I know the least about and is the most expensive to fix is what is what causes me paranoia. Engine and suspension problems, I usually easily find the issue, fix it and I'm done. Sometimes, they're "free" fixes. I wish the drivetrain was that easy

Oh and I've NEVER laucnhed the car. Not sure how the previous owner treated the car, but it's good shape otherwise. I was going to go to the track next Sunday, but I think I might scrap that idea. Don't want to make my possibly cracked first gear worse! Hahaha.

 

I have a very similar sound like you described...no whine when coasting in neutral, but faint light whine when driving, or stepping on the gas. I think its normal drivetrain noises of an AWD. I can hear it better when i'm in a parkade and it echoes more. I don't really worry about it because its definitely not the t-case death whine.