Near 140,000 miles, usually the left side gets the bush wear, when the road use adds up.
If you grab the track rod tight, see if you can feel any play in the rack bush, but really needs to be up in the air. Your drip tray will provide more evidence....
If fluid leak, it will mix with the inner ball joint oil, so will point to one thing or the other, if you have to top up the fluid, then it is probably what you are going to see.
I took our run-around to B-Quik because of a steering rack prob, just to get it up in the air, I got under there to have a prod, the rack was knackered, they didn't do racks, so got it fixed where they did...