Need help fast! Front axle won\'t disengage 93 fullsize Blazer, 81000 miles When I put my Blazer in 4wd, it goes in, but makes noise, like a bad bearing. When I put it back in to 2wd, it won't come out of 4wd until I come to a complete stop. I jacked it up and it still has the noise, but shifts into and out of 4wd normally. The actuator has already been replaced with the updated one last year and seems to be functioning normal. The cv joints, u-joints all seem fine and there is nothing that looks or sounds bad when turning front wheels by hand. I THINK there is something broke/worn inside the axle. Is this a serious problem? I'm pretty mechanically inclined(replace motors/trannys), but have never touched a front axle. I would like to know what exactly this problem is and if I should attempt it, or at least get an idea of what kind of money it's going to cost to repair. The truck is going up for sale as soon as this is fixed. Actually, I had to cancel the ad, because of this. Any ides or suggestions would be greatly appreciated!