Humming drivetrain noise?
#1
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Car Info: Subaru Impreza WRX 2002
Humming drivetrain noise?
I posted about this a while back in the EJ20 forum, but now I have localized the problem and I'd appreciate some more input on what is going on...
I have an 02 WRX with 30,000 miles. When I approach 50 MPH in 3rd or 4rth gear (3500 or 2900 RPM) I can hear a very loud humming sound that seems to come from near the engine compartment. The sound only appears when I am accelerating; if I step off the gas, it goes away.
Here's what makes me think my transmission is involved: if I push in the clutch, the sound goes away, even if I do not change speed at all.
I took it to my dealership (a very reliable and knowledgeable bunch, they are even fine with many mods) and they couldn't figure it out; they said it might be my aftermarket tires and rims ("17s). But the fact that depressing the clutch makes the sound go away focuses my attention on the drivetrain. Any clues?
I have an 02 WRX with 30,000 miles. When I approach 50 MPH in 3rd or 4rth gear (3500 or 2900 RPM) I can hear a very loud humming sound that seems to come from near the engine compartment. The sound only appears when I am accelerating; if I step off the gas, it goes away.
Here's what makes me think my transmission is involved: if I push in the clutch, the sound goes away, even if I do not change speed at all.
I took it to my dealership (a very reliable and knowledgeable bunch, they are even fine with many mods) and they couldn't figure it out; they said it might be my aftermarket tires and rims ("17s). But the fact that depressing the clutch makes the sound go away focuses my attention on the drivetrain. Any clues?
#2
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I'd be surprised if any humming coming from the transmission itself didn't manifest itself as something rather obvious quickly. I'd be more inclined to think it's a wheel bearing. You don't get the sound in 5th gear at that speed though?
#3
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Originally Posted by BAN SUVS
I'd be surprised if any humming coming from the transmission itself didn't manifest itself as something rather obvious quickly. I'd be more inclined to think it's a wheel bearing. You don't get the sound in 5th gear at that speed though?
Hmm, a wheel bearing? That sounds like a pretty good guess -- but I still can't explain why pushing in the clutch makes the sound go away. It certainly left the techs at the dealership puzzled, and some of those guys have been working on Subarus for 15+ years... I agree that if I had a transmission problem I should probably be having other symptoms, such as a slipping clutch or grinding between shifts (I don't).
I originally thought it was an exhaust leak -- perhaps the thing with the clutch puts that idea back in play?
#4
this a common problem wrx transmissions..the first step you should take is replace yous trans oil..1 reason they start to whine or humm is cause the oil is beat it should be replaced every 15000 miles so you should have done it twice ..andther reason it would whine is if it was grinding and scared the gears but if it never grinds all you should have to do is replace the trans oil..ur dealer should have it or any of these vendors should carry what you need.............
#5
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No, the fluid was changed by the dealership and it actually made the sound louder! Also, it never grinds, except for the common grind while downshifting into first. Thanks for your input!
#6
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Car Info: 2002 Sooby WRX (not runing right)
I never grind going into first, but then agian I have had a WRX sense the first month they came out so I learned quick heh. Heal toe downshifting.. always(especialy when going into first)
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#8
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Originally Posted by aloose
I never grind going into first, but then agian I have had a WRX sense the first month they came out so I learned quick heh. Heal toe downshifting.. always(especialy when going into first)
Your Sancros will luv you!
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#9
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Originally Posted by 2Point2WRX
try an aftermarket oil thats a little thicker than stock then ..like the royal purple ..ive only heard good stuff about it ... give it a try its alot cheaper than another tranny ya know...
#10
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Car Info: 2002 Subaru Impreza 2.5 RS
I get the sound in 4th too on my 02 RS. I can't hear it as much when accellerating, but when I let off the gas in 4th at about 2500-3000rpm I get this rattly grindy type of sound.
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