Ok so I ask a question and do not get it answered. If its possible without jacking up the tire, removing the locking hub and taking the bearing apart. That was it nothing more. Never mind though I'll just do it that way because I can't get an answer.
Actually, your question was answered.
You asked if the bearings could be greased, without disassembly, using the ABS sensor hole, and the answer is no. Your axle does not have a unit hub, or front abs. You have the classic, bearings, oil seal, spindle nut, and lockout. The only way to re-grease this style hub is to jack up the truck, remove the wheel, brakes, rotor, lockout, spindle nut (using the proper, special socket, bearings and hub. Clean and re-grease the bearings, install a new oil seal, and reassemble in the reverse order. There’s no other way to grease them.
On the 99-Up SuperDuty trucks, like the original question was asked about, have a unit hub, which technically, are not greaseable or serviceable as individual components. You just remove the wheel and brakes, remove the 4 bolts holding the hub to the knuckle, and replace the unit. Someone figured out, you could add grease to the unit hubs, using the hole in the unit hub assembly, for the ABS sensor. An adapter is available to make this a bit easier, but you still have to remove the tire at a minimum, to access the sensor location. It’s tucked in on top. This still isn’t a proper servicing of the bearings, because you can’t remove the old grease. This does help to extend the life of the bearings.
