how do i know if my transfer case is going or gone bad acceleration is slow but so far no slippage. The same with the rear differential its not making a clanging noise likethe vids i"ve watched. neither is making a grinding noise just an annoying rubbing noise. this is a 01 yukon xl 1500 sle

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to pinpoint sounds, do my video "finding the source of car noises" then you know exactly what part is making the noise and can decide if it's something you can live with or not.