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Old 06-10-2007, 09:45 PM
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Location: San Diego, CA
Cobra Make, Engine: BDR #455, KC427W, TWM-FI
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The diameter of the "centering" device on the back of the driveshaft flange and the diameter of the rear differential centering device are different diameter (but close). Even if your bolts are tight it may jack around a bit and cause the driveshaft to be out of balance.
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