$800 seems high to me. You can buy a rebuilt rack for $250 or less.

Installing it is a messy 2-3 hours, no outrageously special tools needed -- you can even avoid removing the tie rod ends by unscrewing them from the tie rods.

When you're finished. you must align the front end -- probably $40-$75.

I've had three incidents -- an '82, an '83, and an '86 -- that dripped fluid from one seal or another for a few months and then sealed back up. I think that sometimes a piece of grit gets under the seal lip, lifting it, and permitting fluid to drip. But then the grit is swept out and the seal restores itself.

You really do NOT need to fix this immediately. Park where a puddle doesn't matter -- or use a piece of cardboard to absorb it (keeping it from driveways and storm drains) and keep several extra quarts of ATF with you. If it gets low, it'll growl 'n groan as the pump circulates air bubbles.
--
Don Foster (near Cape Cod, MA)