Recently did a tune-up on my FJ62, including chassis lube. Today, I went out and locked up the hubs because it's still freakin' snowing in the Colorado mountains, and I got this noise from the front axle. I stopped, unlocked hubs, noise went away. I stopped, engaged 4wd w/unlocked hubs, noise came back.  isengaged 4wd, noise went away. So it seem the noise only happens when the front axle is turning, and it starts up around 25mph. The noise isn't bad, but it doesn't sound good. Gets worse as you go faster. No vibration in the cab. When I did the chassis lube, I used standard #2 lithium grease, and hit all the fittings in the manual, including the birfields. What did I do wrong?