Re: 99 F250 sd front wheel bearing replacement ???
Assuming your rig is a 4x4, then you have a Dana front axle and you cannot replace or even pack the front wheel bearings. The only fix is to replace the ball joints per that article Kevin linked to.
Kevin stated "Standard hand tools are all that's needed" but he forgot to mention that you'll need to borrow/rent a ball joint removal tool. Per the article: "Place knuckle in vice and use a ball joint removal kit to drive out lower and upper ball joints. I borrowed one of these kits from AutoZone."
But if you have a 4x2, then you have a normal Ford "twin I-Beam " front axle, and the front wheel bearings can - and should be - packed every 30k miles. All you need is new grease seals and some wheel-bearing grease. And a wheel bearing packing tool is nice to have, even if you know how to do the nasty job of properly packing a wheel bearing by hand. [img]/ubbthreads/images/graemlins/crazy.gif[/img] And if necessary you could replace a front wheel bearing, but that's pretty rare in a 4x2.
My Sierra Blanca in the sig pic was a great pickup for 11.5 years. I sold it a coupla years ago. I drove a hand-me-down 2003 F-150 SuperCrew 4.6L 2V for a while, but it was unacceptable for towing more than a rowboat. Replacement is a 2012 F-150 EcoBoost SuperCrew Lariat that tows my 5,000-pound TT like a dream.