I know their is a seal that people do replace, especially on the Land Cruisers, after alot of mudding eventually grit makes it in their, rebuilding/cleaning them out from time to time extends the life of the joint. I should have worded my "seals, gaskets, goodies" differently -- I need to go through front and rear axles, it sat for a year and a half while I was waiting for money to build/rebuild my engine, and I think the seals in my axles are shot. I know one in the back is because about the time I hit 1500 miles on my new engine, it started spewing out gear oil, spin art all over the inside of my rim and tire.
So I'm going to replace the seals in the rear, and up front do birfields/steering knuckles, Its the steering knuckles that I need the gaskets,felts, etc...