Shhh noise primarily in 5th
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This is a discussion on Shhh noise primarily in 5th within the Transmission & AWD forums, part of the Tech & Modifying & General Repairs category; Hi Guys: I have a 2003 WRX with 118,000 miles on it. I am the original owner and it has ...

  1. #1
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    Shhh noise primarily in 5th

    Hi Guys:

    I have a 2003 WRX with 118,000 miles on it. I am the original owner and it has the original clutch. I drive the car harder than I would a minivan, but I am never abusive, especially when it comes to hard launches, shifting, etc. Very few mods, mechanically well maintained. I do a fair job matching RPMs when shifting, just out of habit driving old trucks, etc. I started noticing a sort of shh sound primarily in 5th gear. Not very loud (I actually can't remember when it started), but it is beginning to nag at me. It is loudest when I am not touching anything and the shifter is resting on the left side of the fifth gear gate. If I move it to the center or right of the gate, the sound all but goes away. I can also replicate the sound in fourth and third (and possible 1 & 2- hard to hear though) by pushing the lever lightly away from its center position (I know its bad to drive around with your hand on the shifter, I am just doing this for a moment to attempt to diagnose the problem). I am leaning towards synchro noise, but it shifts perfect; no grinding at all. Could it be the linkage is out of adjustment? Performance has not changed. I don't even experience the issue shifting into 1st as long as the car is going under 15 or so (it is actually slightly better than when I bought it). I recently changed the tranny fluid again (new AMSOil 75W90), but that made no difference at all.

    Is this something I should worry about, or just turn on the radio? I tend to fixate on car noises...

    Thank you,

    NB

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  3. #2
    and the Funky Bunch Calvinball's Avatar
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    Hard to say, can you post a video?
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    Quote Originally Posted by Calvinball View Post
    Hard to say, can you post a video?
    I tried, but you can't really make it out. The closest thing it comes to in sound is that of the turbo spooling (I have my intake silencer removed). It is not the turbo though, I am sure of that. I'll try again with a better video camera if I can find one. It also seems to be a bit louder in the morning when it is cold. It changes pitch with car speed. I also believe that the noise goes away when the clutch is depressed.

    Thanks,

    NB

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    edit, sound continues regardless of clutch position. It is the same shh sound that occurs when downshifting into second or fourth. Can the 4th gear synchro make noise while in 5th? Could it be a shift fork sound?

    Thanks,

    NB

  6. #5
    Admiral Ackbar the 1st mycologist's Avatar
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    You probably have to be there. I would consider having a tech you trust listen to it.
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