Anybody ever have this problem? I'm puzzled

I recently broke a stud and had replace it. Front driver side. In the process I broke a couple more and due to rust I had to actually cut my wheel spacer off, so eventually I got a new spacer on. New studs and that went fairly smooth all things considered.

In the process of that project I noticed my pads were toast, so I got some new brake pads, my rotors were looking in decent shape and since I'm not working currently keeping the original rotors was the only option. I followed the instructions to tee including support the caliper so not to hurt the brake line. Now about a month after the fact today I hear clunk sound and something seems to be up with the caliper or so I think. I jack her up. Remove the wheel and to my surprise the caliper is still in position, bolts are not loose. Pads look to be seated properly and the spacer is nice and tight. But there is best I can speculate oil or something like that all over the CV boot and the boot of the steering arm thingy behind the cv about 5 inches back. Brake line looks alright and is dry. I can not find the source of to the mystery fluid. I also inspected the oil filter since I changed my oil when doing the other stuff, filter is snug and free of any liquid on it.

The other relevant item is that I lost oil filler cap and drive around a week or two without one, my oil level barely dropped and from what I can tell barely sprayed any out, there's a bit of wetness on the belly of the hood. I ended up rigging a pop bottle cap with some zip ties to ensure no more oil could escape. I got a new cap about a week ago and oil level has been fine. And nothing around the oil cap is even close to being soaked in thick fluid as the above mentioned boots.

Im at a loss and currently parked at a strip mall with the truck jacked up wheel off and would love if anyone has some ideas or had any similar experience to provide me with any clue or solutions as im now shy to drive as it's freeway to get home and brakes must be fully operational to safely make the trip. So far the brake still has pressure in the line so I'm oblivious to the reason behind the noise and source for this fluid all over. Please see pics attached and help me out if you can?
Thanks Toyota family, thanks for having me on your forum I am eager to learn from your experience .

 

CV boot tore and the grease flung out.
Should be safe to drive, just plan on getting a new CV to replace sooner than later.

 

Frame had enough and requested the CV seal to split so it could apply a greasy film to it to stop the rust.

The clunk is the CV joint getting loose enough to possibly fail.

 

I appreciate your wisdom gentlemen. Thank you much. Only one more question for now... Can I just throw 1 CV on and wait for the other to fail or the pair of them are somehow joined by the bonds of matrimony and the second one will surely be miserable and potentially take its own life if separated from its partner?

 

Just replace the axle shaft assy on that side but if you are lifted, make sure you get one the same length, some aftermarkets seem to have serious issues with quickly failing when put on lifted trucks.

 

If you're doing DIY, what I would do is order OEM boot kits and 1 axle from the dealership, but let them hold onto one of kits and the axle so that you can get a refund if needed. Take the axle in question apart and inspect everything. If you determine you need to replace the whole thing go back to the dealership and pick up your parts with another vehicle or uber. Replace the axle on the one side and just replace the boots on the other.

If you're paying someone to do it just replacing the entire axle will cost less.

 

Your rust is epic dude! As far as suggestions go, I have had and done the exact same thing as many others have here. I offer that you simply buy a single half axle that already has the grease and boot on and simply replace the bad one. It'll save you money and a lot of headache instead of rebuilding.
One thing I would add just out of caution is to just do the other side too since your entire "underneath" looks to be held together by rust plates. The process is easy and you can search youtube for step by step process (heck, if I can do it I know you can too).
Final note, not that it matters much now, but take your aluminum wheel spacers off. The steel is straight up rusting because of the aluminum. Kinda like having a zinc bar on a boat as a sacrificial anode, except your truck is the zinc bar in this case.