Ok guys, I'm sure some of you have seen the excellent post where the axle seals and bearings were replaced on a 2004 F150. I called my local Ford dealer today and got the part numbers for my 2003. Turns out they are the SAME!. Now this may or may not apply to you and you need to write down the info from your diff tag and call you local dealer to confirm. I have a 9 3/4 rear diff with 3.73 LS gears. The part numbers are:

Seals: p/n 5L3Z-1S177-AB

Bearings: p/n 5L3Z-1225-AA

and remember to get a bottle of friction modifier if you have a LS!

I hope to get the money to do all of this to my truck soon, but only time will tell. I hope this helps someone with a 97-03----DirtySCREW