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Old 04-30-2012, 06:52 PM   #7
dude dog
Registered User
Join Date: Mar 2011
Location: washington state
Posts: 143
My Ride: BMW
They do go bad sometimes but if it does you will know it. Mine started with a limping feeling. Like the car was surging. It took about a month after it started that then it went out fully. It would go about half way around and then clank real hard and go half around again. That's what happens when they go out. I went on ebay and ordered a used one for $150 plus shipping and it took me about 3 hours to change it and I am no mechanic. Found a good diy on here and went for it. It was easy. In my opinion if your diff goes bad you know that something severe is wrong and if you couldn't tell then I think they are trying to screw you. Take it somewhere else and get a second opinion.
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