try this:
Greaseable Front Hubs
2001 Dodge Ram 4x4 2500
Remove wheel, brake caliper, and brake rotor.
Remove ABS Brake sensor retaining bolt (don’t attempt to twist or remove ABS sensor unless it’s being replaced, it could easily break…trust me, I know)
The threaded portion of the hub that this bolt just came out of is shallow, with a small ( smaller than the thread size so we don’t damage the threads ( I used 1/8”) drill bit, covered in grease ( to capture the shavings) I drill down this hole until just breaking threw to the cavity between the inner and outer bearing. Do not put much pressure on the drill so when it breaks threw it won’t go deep into the cavity and carry filings with it. Also, note that the tone wheel for the ABS is also in this cavity, we don’t want to damage it.
Replace the ABS sensor retaining bolt with the new bolt modified as follows:
Using a new bolt the same thread but about ½" longer than the factory bolt (about 1 ¼” long, you can trim it when you install it if need be), drill a very small hole directly thru the bolt from the head down. I used a drill press and center punch for this as it is more accurate.
With the bolt drilled, I Mig welded ( could be brazed or wire feed as well) a nut on the head of the bolt, into the nut I screwed a grease fitting, then I put the bolt back into the hub and with the use of a nut ( as a jam nut) I tighten the ABS sensor in place. Now you have a way to grease the bearings.
I have been greasing the bearings about once a year now for about 5 years; both are fine, the truck has 500,000kms on it (310,000 miles).
I have this same thing to 2 other trucks, both have high mileage; neither has ever had a front bearing replaced.