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Old 08-26-2009, 05:28 AM   #4 (permalink)
bikin' Ed
Master EcoModder
 
Join Date: Jul 2008
Location: Tallmadge, OH
Posts: 276

Big Blue - '06 Dakota Quad SLT
90 day: 20.36 mpg (US)

Miazda - '96 Miata mx-5
90 day: 44.14 mpg (US)
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My money is on the pinion bearing. I'd replace the bearing, use a new seal, clean up the innerds, and add new synthetic oil. Unless when you are in there you see a major problem, you might be able to eek out another 100,000 miles or so.
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