Vibration, going insane now !!!
04 August 2012, 06:03 PM
#1
Vibration, going insane now !!!
Ok, basically I've had a loud vibration coming from the rear of my car for some time but it's finally starting to send me mad. It does it in any gear at anything over 3000 rpm when the accelerator is released. For example, foot down in 3rd up to say 4K and then fully back off. It's pretty loud and can be heard clearly from both inside and outside the car.
Only does it above 3K and won't do it when standing still.
I've removed every bloody heatshield in sight and had my pry bar everywhere today. Nothing seems out of place, there is a little bit of play in the rear beam (across the entire width of car with bush each end) but not sure if that's normal and there is also a small amount of up/down and in/out movement in the rear drive shafts (again, not sure if that's normal).
Thunder8 and myself have been scratching our heads all day and just about out of ideas.
What's your thoughts ?
Anybody had something similar ?
Only does it above 3K and won't do it when standing still.
I've removed every bloody heatshield in sight and had my pry bar everywhere today. Nothing seems out of place, there is a little bit of play in the rear beam (across the entire width of car with bush each end) but not sure if that's normal and there is also a small amount of up/down and in/out movement in the rear drive shafts (again, not sure if that's normal).
Thunder8 and myself have been scratching our heads all day and just about out of ideas.
What's your thoughts ?
Anybody had something similar ?
04 August 2012, 06:22 PM
#2
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I've had something similar on my V4 for ages - to me it feels like a thrust bearing (clutch release bearing to you youngsters!) or maybe a gearbox on the way out 
I'm waiting for it to get worse so my mechanic can say "ohyeah, I know what that is" when he hears it
I'm waiting for it to get worse so my mechanic can say "ohyeah, I know what that is" when he hears it
04 August 2012, 08:00 PM
#11
Ok, basically I've had a loud vibration coming from the rear of my car for some time but it's finally starting to send me mad. It does it in any gear at anything over 3000 rpm when the accelerator is released. For example, foot down in 3rd up to say 4K and then fully back off. It's pretty loud and can be heard clearly from both inside and outside the car.
Only does it above 3K and won't do it when standing still.
I've removed every bloody heatshield in sight and had my pry bar everywhere today. Nothing seems out of place, there is a little bit of play in the rear beam (across the entire width of car with bush each end) but not sure if that's normal and there is also a small amount of up/down and in/out movement in the rear drive shafts (again, not sure if that's normal).
Thunder8 and myself have been scratching our heads all day and just about out of ideas.
What's your thoughts ?
Anybody had something similar ?
Only does it above 3K and won't do it when standing still.
I've removed every bloody heatshield in sight and had my pry bar everywhere today. Nothing seems out of place, there is a little bit of play in the rear beam (across the entire width of car with bush each end) but not sure if that's normal and there is also a small amount of up/down and in/out movement in the rear drive shafts (again, not sure if that's normal).
Thunder8 and myself have been scratching our heads all day and just about out of ideas.
What's your thoughts ?
Anybody had something similar ?
05 August 2012, 10:24 AM
#12
Anybody got any tips on swapping it, looks like a ball ache job.
05 August 2012, 10:48 AM
#13
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Rear diff isn't that bad to be honest. Better on ramps though, did it on my driveway, took about two hours. But need a second pair of hands to get the thing in place again
07 August 2012, 09:31 PM
#15
Well chaps....
Fitted another rear diff tonight and the problem is still there, if anything it's slightly louder.
Basically I accelerate in say 4th gear up to say 5K, back right off and let the revs fall. As soon as they hit 3K I get this noise. Almost sounds like teeth slightly grinding.
If I push the clutch it is goes away instantly.
What do you guys think ?
Fitted another rear diff tonight and the problem is still there, if anything it's slightly louder.
Basically I accelerate in say 4th gear up to say 5K, back right off and let the revs fall. As soon as they hit 3K I get this noise. Almost sounds like teeth slightly grinding.
If I push the clutch it is goes away instantly.
What do you guys think ?
03 September 2012, 11:36 PM
#24
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Hello Matty,
do you have any updates on this? My scooby started to do this right after I had my mechanics change the flywheel to a lightweight one and the clutch to an pink box exedy uprated one. Grinding noise on overrun from 3000-2000rpm from the back of the car. Had no issues before the change, so the gearbox and diff should still be ok. Just wanted to narrow the problem down, before I have them change the clutch again...
So if you have any tips for me I'd be very grateful.
I also made a short vid for reference. The noise can be heard quite well at 1:00+
do you have any updates on this? My scooby started to do this right after I had my mechanics change the flywheel to a lightweight one and the clutch to an pink box exedy uprated one. Grinding noise on overrun from 3000-2000rpm from the back of the car. Had no issues before the change, so the gearbox and diff should still be ok. Just wanted to narrow the problem down, before I have them change the clutch again...
So if you have any tips for me I'd be very grateful.
I also made a short vid for reference. The noise can be heard quite well at 1:00+
30 September 2012, 12:29 AM
#26
Hello Matty,
do you have any updates on this? My scooby started to do this right after I had my mechanics change the flywheel to a lightweight one and the clutch to an pink box exedy uprated one. Grinding noise on overrun from 3000-2000rpm from the back of the car. Had no issues before the change, so the gearbox and diff should still be ok. Just wanted to narrow the problem down, before I have them change the clutch again...
So if you have any tips for me I'd be very grateful.
I also made a short vid for reference. The noise can be heard quite well at 1:00+
http://www.youtube.com/watch?v=YWnKFPlJu8k
do you have any updates on this? My scooby started to do this right after I had my mechanics change the flywheel to a lightweight one and the clutch to an pink box exedy uprated one. Grinding noise on overrun from 3000-2000rpm from the back of the car. Had no issues before the change, so the gearbox and diff should still be ok. Just wanted to narrow the problem down, before I have them change the clutch again...
So if you have any tips for me I'd be very grateful.
I also made a short vid for reference. The noise can be heard quite well at 1:00+
http://www.youtube.com/watch?v=YWnKFPlJu8k
Any update, did you get this sorted chap ??
30 September 2012, 11:44 AM
#27
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Hey Matty,
problem not sorted yet. I went to 3 different Subaru dealers and finally got a good hint from one who is also rallying. He asked me about the exchange clutch and flywheel and mentioned, that those aftermarket parts don't have the dampening, that the Subaru parts have.
After that I had a poke around here on Scoobynet and found some threads describing this problem. Here are the links just for convenience:
https://www.scoobynet.com/general-technical-10/897272-pinkbox-excedy-fitted-no-judder-but-odd-noise.html#post10141850
https://www.scoobynet.com/showpost.p...2&postcount=13
https://www.scoobynet.com/drivetrain...elaration.html (posts 3, 6, 11, 14, 18 and especially 13)
https://www.scoobynet.com/drivetrain...ion-noise.html
https://www.scoobynet.com/showpost.p...0&postcount=10
https://www.scoobynet.com/showpost.p...25&postcount=3
The first one is the most important to me because of the video. Exchanged some messages with "53" and it seems to be the combination of clutch and flywheel which is causing this behaviour. Nothing too serious from what I understand but still very annoying. This is also backed up by the fourth link I posted above.
I'll take my car to the mentioned dealer this week to have him check everything and most likely change the lightweight flywheel to a genuine Subaru one. I really hope this fixes everything...
Sorry, I can't help you more. Please keep me posted on the progress on your car. Would be great to know, if it's a bearing on the gearbox if the flywheel change doesn't do the trick.
problem not sorted yet. I went to 3 different Subaru dealers and finally got a good hint from one who is also rallying. He asked me about the exchange clutch and flywheel and mentioned, that those aftermarket parts don't have the dampening, that the Subaru parts have.
After that I had a poke around here on Scoobynet and found some threads describing this problem. Here are the links just for convenience:
https://www.scoobynet.com/general-technical-10/897272-pinkbox-excedy-fitted-no-judder-but-odd-noise.html#post10141850
https://www.scoobynet.com/showpost.p...2&postcount=13
https://www.scoobynet.com/drivetrain...elaration.html (posts 3, 6, 11, 14, 18 and especially 13)
https://www.scoobynet.com/drivetrain...ion-noise.html
https://www.scoobynet.com/showpost.p...0&postcount=10
https://www.scoobynet.com/showpost.p...25&postcount=3
The first one is the most important to me because of the video. Exchanged some messages with "53" and it seems to be the combination of clutch and flywheel which is causing this behaviour. Nothing too serious from what I understand but still very annoying. This is also backed up by the fourth link I posted above.
I'll take my car to the mentioned dealer this week to have him check everything and most likely change the lightweight flywheel to a genuine Subaru one. I really hope this fixes everything...
Sorry, I can't help you more. Please keep me posted on the progress on your car. Would be great to know, if it's a bearing on the gearbox if the flywheel change doesn't do the trick.
01 October 2012, 10:53 AM
#29
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That's what I was asking myself, too. To swap or not to swap... Worst part of this is, that "testing" is always quite expensive... Cost me 700€ just to get the clutch and flywheel in...
And having multiple possibilities for the cause of this problem doesn't make it easier...
I'll have my car done on Thursday or Friday so my results might be to late for you. Sorry
And having multiple possibilities for the cause of this problem doesn't make it easier...
I'll have my car done on Thursday or Friday so my results might be to late for you. Sorry
01 October 2012, 01:59 PM
#30
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Also found another thread:
https://www.scoobynet.com/drivetrain-11/473901-diy-timing-belt-and-clutch-replacement-done.html#post5236611
So I definitely will be changing the lightweight flywheel. Being able to quickly heel&toe is not worth the trouble on a road car. Also thought about clutch alternatives but I need the higher clamping pressure of the Exedy clutch since the genuine Subaru one was slipping badly...
https://www.scoobynet.com/drivetrain-11/473901-diy-timing-belt-and-clutch-replacement-done.html#post5236611
So I definitely will be changing the lightweight flywheel. Being able to quickly heel&toe is not worth the trouble on a road car. Also thought about clutch alternatives but I need the higher clamping pressure of the Exedy clutch since the genuine Subaru one was slipping badly...