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Old 04-09-2019, 21:26   #1
luca wrx
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Question evo V gearbox noise

hello i try to explain my problem that makes me crazy...

i owned 2 evo (all with the normal 5speed gearbox) and all of these cars make this noise from the gearbox...

it is like a bearing noise (rattle) from the gearbox



i tryed to change the gearbox oil , clutch bearing, clutch and flywheel but the noise doesn't change...

i would like to know if somebody has had the same problem or has experience with this noise


thanks guys for your help
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Old 06-09-2019, 14:50   #2
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Are you sure its the gear box and not the transfer case ? If your shifting gears ok and there are no problems Id say that there is probably an issue with the transfer case diff.
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Old 07-09-2019, 11:17   #3
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Are you sure its the gear box and not the transfer case ? If your shifting gears ok and there are no problems Id say that there is probably an issue with the transfer case diff.





hello mate, yes i can shift all gears perfecty without problem
yesterday i made a test, i lifted the car and i shifted some gears 1-2-3 and after 4.000 rpm (like the video) underside the car i heard the noise only from gearbox...not the transfer
i really don't know, if the gear bearings can make this...but i think that the only way is to open the gearbox and ceck all parts...
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Old 12-09-2019, 13:51   #4
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What exact clutch are you using?
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Old 12-09-2019, 16:35   #5
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What exact clutch are you using?
hello Clive, i changed the clutch some month ago, but the noise is always the same


the first clutch and flywheel was the oem, after this i installed a new cusco hyper single with a new oem bearing with millers gearbox oil
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Old 13-09-2019, 20:34   #6
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heat shield or loose 02 sensor on the exhaust ?
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Old 14-09-2019, 21:10   #7
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It sounds like resonance, is the engine standard?
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Old 16-09-2019, 20:09   #8
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heat shield or loose 02 sensor on the exhaust ?

thanks mate for the idea, just checked, but it's all ok with all bolts
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Old 16-09-2019, 20:31   #9
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It sounds like resonance, is the engine standard?
yes i think the same, but it's very strange....!

the engine is standard (only with HKS 264cam)

can the gearbox bearings make this noise for you?

i put the car on jack lift and i tried to listen the noise under the car in acceleration and deceleration but no vibration founded...

only noise that i can hear only from inside gearbox...

i made this video:

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Old 25-09-2019, 06:53   #10
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You don't normally get a resonance type noise from inside the gearbox because the oil dampens noises of that frequency. The noise in the 2nd video doesn't sound right though.
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Old 26-09-2019, 21:59   #11
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Have you tried accelerating with no gear inserted? Does it make that noise?



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Old 10-10-2019, 20:06   #12
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You don't normally get a resonance type noise from inside the gearbox because the oil dampens noises of that frequency. The noise in the 2nd video doesn't sound right though.
some news: i removed the gearbox and i changed all bearings , but the noise is always the same from the box in deceleration....
and when i press the clutch the noise disappears...

the tuner told me that the gears are wear and they can make this noise but it's strange...a vibration from gears...
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Old 10-10-2019, 20:09   #13
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Have you tried accelerating with no gear inserted? Does it make that noise?



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yes i tried mate, without gear inserted there is no noise
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