there are 2 sealsm and a dust seal. you have an 04 so im guessing yourdust seal is just hanging on the axle like all the rest. I would jet all my parts from FORD and get the new updated dust seal. you can rent tools at autozone if you need it. Oh and have FUN with the serp belt. thier is a reason Ford pays .9Hrs to install a serp belt on a diesel.....
2005 F-350 King Ranch FX-4 CC long bed
2in level kit...airade intake with 4micron sock...superchips....sinister coolant filter.....blue spring update....ranch hand wrench ready front bumperreplacement.... installing glowshift gauges this week....EGT,BOOST,TRANS TEMP,FUEL PSI. with quad gauge pod A-PILLAR (DONE) 4IN turbo back cat delete
In the Garage
1995 F-150, 460CID, 9in currie rear, C-6 trans, 4.56gears, 23in susp travel.
2004 Expolrer 4.0L
2012 BOSS 302 (If the wife dont kill me)