If I'm not mistaken, you have sealed bearing and hub assemblies that are not serviceable. When they start to sound like an airplane engine, the fix is to replace them. These sealed units are a lot more expensive but they are fairly easy to replace. Only three bolts hold them to the spindle, and the axle nut must be removed. It is real important to not put any of the vehicle's weight on the new bearing until that axle nut is tightened to the proper torque, often as high as 240 foot pounds. Putting weight on it when the nut is loose will damage the bearing and make it noisy.
If you have a two-wheel-drive truck, you should still have tapered bearings in the front. To grease them you'll need to remove the brake caliper. Don't let it hang by the rubber hose because that can tear the inner liner. Hang it with a piece of wire or lay it on the steering linkage. I think there is a video clip of how to take the bearings apart to clean and lube them. If you can't find it, let me know and I'll describe it as best I can.
Sunday, December 5th, 2010 AT 9:38 PM