With the links provided below, you should pretty much be able to eliminate the need for the dynatrac kit. If you can do these maintenance items yourself then you should be able to make these items last indefinitely.
This link outlines how to remove the sealed wheel bearing assembly. You will have to scroll through the description a bit to look past the work done after removing it until you get back to the reinstallation but it does have some good info so my suggestion is to read the whole article. Since your hub failed I would take specific interest in the section of this repair where he links to two threads on the Ford Trucks Enthusiasts site titled Greasing you sealed hub wheel bearings:
2004 F250 Ball Joint Replacement
Then before reinstalling the hub assembly you'll need to service the needle bearing described here. This is the bearing that your owners manual lists as needing lubrication every 60,000 miles and for good reason too as it supports the outer stub shaft and if this bearing drys out you will damage the stub shaft and have to replace it:
2004 F250 Needle Bearing Replacement
After you have that done, read this article and you can service the last bearing inside the locking hub mechanism. This bearing is not replaceable but it only supports the end of the stub shaft for the axle drive:
2004 F250 ESOF Hub Service
On a special note, I recently did a service of the front end. Ball Joints, all new seals for the hubs and four wheel drive system and serviced all the bearings with the specific grease listed in FTE site links. Greasing the sealed hub assemblies was a definite improvement and I believe I can get to 200,000 miles on the original sealed hubs. I'm a firm believer in buying genuine Ford parts, they are the original style, designed to the original tolerances, with a 1 year/12,000 mile warranty, available at any dealership where the computers can pull up VIN # specific information to make sure you get the correct parts and get the project done. I'm suprised more people don't do this either, because most dealer parts counter employees survive on volume of sales so they like to discount parts prices to keep you coming back which allows you to get an excellent quality part at a competitive price. Just my 2 cents on the that.
Hope this helps, I got a little carried away on the info here but I really found these links helpful and it was actually a really fun project, especially when my dad came out in the garage with my truck completely disassembled and just looked in disbelief and said "How do you keep all the parts straight in your head?!" So yeah, use these links and you'll get your truck up and running good as new.
