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Old 08-03-2009, 08:10 AM   #2
Bladecutter
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Join Date: Jan 2009
Location: Arvada, CO
Posts: 229
My '98 Boxster made the same noise in the right rear tire, and the cause for it was due to that strut having leaked out its oil, and eventually wore out.

Once I replaced the rear struts, the car no longer made that vibration thunking sound on hard right turns. Just like your car, it was silent on left turns.

I would take a look at the strut, and see if their is oil all over the body of the strut.
If there is, its time for new ones.

BC.
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'98 Silver Boxster, '08 Ducati 848, '89 Honda Hawk GT, '89 Honda Pacific Coast
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