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Posted 09 June 2011 - 05:13 AM
I think I have a noisy diff, Its an 89 Legacy 5 speed manual 1800cc. I'm getting a whirring sound from the rear that gets louder the faster I go and to the point where the stereo doesn't make the drive acceptible however I don't like BOOM BOOM DUFF DUFF too much . I have a new clutch and drive shafts and the wheel bearings are good as far as I know. Any advice would be good as to where I should start.
Also when I engage the AWD button on the stick when on the road it feels like the back just winds up and I cant go back or forward. Is it because i'm on the tarmac or is it buggered.
Thanks for reading and hope you can help.
Posted 09 June 2011 - 09:45 AM
is there any fluid in the diff?
my guess, without knowing much of anything obviously is that it's a wheel bearing. they sound central while you're driving and only if you sit in the rear trunk area do they reveal which side they might be related too. subaru wheel bearings often don't exhibit typical bearing failure issues too - like play in the wheel, etc. i've seen failed bearings that make no noise when you turn them by hand and feel perfectly tight. once removed and disassembled though it's obvious.
maybe it's bad, just make sure it's not something more common like a wheel bearing. i would have someone ride in the back and listen to see if the noise is center, left, or right.
as far as AWD - not sure how the push button one's work over there, but you are correct in thinking "locked" 4WD, if that's how this one works (like the older gen stuff), should not be used except offroad, snow, mud, grass, etc. otherwise you'll have torque bind.
Posted 09 June 2011 - 10:35 AM
4wd no: dry pavement
engaging with the wheels turned
engaging while spinning wheels
gravel and dirt roads
wet roads at highway speeds and straight roads. not ideal for city driving
engage while driving, at any speed, just let off the gas when you hit the button
4wd can be run at any speed up to top speed
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