[Larry208]

I have a 2002 s10 crew cab. 4.3, 4wd. 172,000 miles. I have a growling noise coming from the front end. Can't pinpoint exactly where. When I accelerate it disappears, and starts again when I let off the gas. If I put it in 4wd it doesn't make the noise. I replaced the front passenger wheel bearing hub, but that wasn't the problem. Help!