I have to replace the front driver side hub/bearing assy. on 05 ranger 4.0 4x4. The new one will be in today. In looking at the old one I can't see how to grease the bearings, its all enclosed, the only place that looks like you could use would shoot grease down the abs sensor hole. Please help

 

The bearings come packed with grease when you buy them, hence why you have to replace the whole hub/bearing assembly when the bearings go bad, unlike a 2wd where you can replace just the bearings.

..soo., in summary, you don't need to grease it. Slap it on!

 

Yup the 98-current 4x4 wheel bearings are non-servicable.