Noises problem
1999 Other GMC Models V8 Four Wheel Drive Automatic 230000 miles
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My 99 GMC Suburban is making a howling sound when i accelerate. I have just changed the ujoint to fix one problem and both front and rear differentials are leaking as well as the transfer case. I know i need to replace the seals, but can not isolate the howling sound. It does get a lot quiter when i stop accelerating.