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PostPosted: Sun Aug 05, 2018 7:05 am 
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Full Pressure Turbo

Joined: Sun Aug 13, 2006 7:26 pm
Posts: 730
Location: Sth of Wolverhampton (UK) and Mullingar (Ireland)
Car Model: 9-5 Aero HOT Noobtune STG3
I know that I'll get help here even though I've now sold my Saab (I'm moving to Ireland and only need one car)

We now only have the wifes VW Transporter T5 bus and it's driving me mad!!!

It had a vibration and rumble at the front. I've changed all the engine mounts, fitted GKN driveshafts and replaced the front wheel bearings. Everything was OK until about a week ago when it developed a rotational "thrumming" noise. It's speed related not engine. It's not a constant drone but "whirr - whirr - whirr - whirr" but longer!

I can detect no play on the gearbox output shaft (when the drive shafts were off)

I'm wondering if the cheap wheel bearings I fitted 6 months ago might have failed?? I cannot replicate the noise when jacked up - only under load.


Suggestions please if you can.


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PostPosted: Sun Aug 05, 2018 7:37 am 
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Talking Turkey
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Joined: Mon Apr 02, 2007 11:52 am
Posts: 23219
Location: not in a SAAB.
Car Model: One of the first RHD 9-5s
Wheel bearings but you should be able to feel those if they are failing. What about cheap, poo, out of balance and/or misshapen tyres?

Also worth checking the bearings, suspension and tyres at the back of the van because noise and vibration gets transmitted through the chassis in unusual ways.

_________________
52 9-5 2.0LPT Vector Sport B235R/GT17562
05 9-5 Aero with all the options.


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PostPosted: Tue Aug 07, 2018 10:40 pm 
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Joined: Thu Jul 05, 2018 11:30 am
Posts: 23
Car Model: 2008 9-5 1.9tid Estate
Warped disc? Disc backing plate?


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PostPosted: Sun Aug 12, 2018 10:35 pm 
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Active user
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Joined: Tue Sep 28, 2010 8:54 pm
Posts: 133
Location: South Lincolnshire
Car Model: 2003 Saab 9-3 1.8t Vector
Quite possibly a wheel bearing if it was a cheap and unfamiliar brand one..
May be worth changing the gearbox oil and checking what debris comes out...
of course. Presuming the tyres are quality and are not worn out/damaged? Could swap the spare (if it came with one) onto each corner to test that.


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PostPosted: Mon Aug 13, 2018 9:02 am 
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Put a SOC in it!
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Joined: Mon Feb 07, 2005 4:48 pm
Posts: 21661
Location: Fliptop Towers, North Yorks...the flat bit.
Car Model: One or two...
Someone's replaced your engine with a Saab V4... :wink: :lol:

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S6 Avant 4.0 V8T 450bhp/550Nm
9-5 Aero 600Nm FB3
900 T16S track hack
96V4s


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PostPosted: Mon Aug 13, 2018 11:52 am 
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Joined: Mon Oct 03, 2016 6:21 pm
Posts: 12
Car Model: 9-5 vector sport 1.9 TIDhirsch
i had a similar type of thing and it was some corrosion on the discs/pads contacting and slightly warped front disc. changed front brakes and it went away


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PostPosted: Mon Aug 13, 2018 2:42 pm 
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UKS Addict
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Joined: Wed Apr 16, 2014 12:26 pm
Posts: 3492
Location: South Oxfordshire
Car Model: 9-3ss Aero 2.0T; OG9-3 vert
My wife's one does this sometimes, I've come to the conclusion that it's the tyres. The brakes have been entirely replaced all round, the bearings checked throughly and everything else that could cause it. On the A1M a few days ago I was certain that a wheel bearing had gone and then on the M1 it was OK again. The road surface and tyre tread seem to disagree with one another sometimes.

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9-3ss SOC Registrar @BHOSaab

2003(53) 9-3 Aero 2.0T
2002(51) 9-3 Vert auto 2.3 Stg5
2013(63) VW T5


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