When I was coming off the backside of my property I was in 4 wheel low and everything was running fine until I hit a little bit of a hole which was slightly rutted. There were these God awful grinding noises that began. I immediately stopped shifted to 2 wheel drive and gingerly pulled myself out. There were no sounds in 2 wheel drive, but when I shifted back into 4 wheel drive h & l the noises began again, but only if there was any resistance. Without any resistance there is no grinding noise and seems to operate fine. This noise is coming from the front transfer case and it really sounds like the gears aren't catching. What could this be?
A friend had similar problem with his 99 chevy. turned out to be a bad bearing which in turn scraped up his pinion pretty good in his front diff. Had to replace them. He had shavings all in there. same happened to his left rear axle months later.
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