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Originally Posted by mattadamsnet
after i travel at highway speeds for 30 or more mins. i'll stop at a red light and as soon as i take off from fist to second gears a loud boom that shakes the truck comes from the rear end. it'll continue to do that untill it cools down, and it wont do it untill run it at hwy speeds for a while.
i got a 99 chev tahoe, just bought it. it's in great condition otherwise, 118k
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this i believe is caused by the wrong/contaminated rear diff fluid. replace fluid remove/clean cover and magnet. inspect for metal shavings buy tube of silicone gasket clean sufaces before applying sealant.make sure you use the correct diff fluid use vin to verify..............should take 21/2 quarts............