thrumming sound on turning left while driving

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thrumming sound on turning left while driving

Postby » Sat Apr 03, 2021 9:02 pm

I have a 08 subaru gt spec b wagon. At about 80 k had a viscous coupling replaced by a recon unit bought from Corgiwerx. Now 30k later I find that on turning left there is a thrumming sound, not when turning rt. I have to be on the move to hear the sound. Accelerating the sound reduces and when taking foot off accelerator, slowing down the sound becomes louder. Any suggestions.
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Car: subaru 2008 gtb wagon

Re: thrumming sound on turning left while driving

Postby bigBADbenny » Sun Apr 04, 2021 8:57 am

It it were my car, I’d start with a visual inspection, then use a contact microphone on various suspension parts to amplify the sound.

Probably starting with the brake shields, knuckle then arms etc.

Bearings/tie rod test is raise car, wiggle wheel L & R to check tie rods, up & down for bearings.

Since the issue is power on/off related, CV’s are a potential source of the sound.

Failing a diagnosis I’d be tempted to use my local driveshaft shop (A1 driveshaft in Collingwood etc) or get an opinion from my trusted local garage (little sams).
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