Brake fluid leak after hard curb hit

First post here and I tried looking for anyone else with this type of problem, but since it's damage from bumping into something, i'm sure it's pretty unique.

So i accidentally hit a high curb and destroyed the rim (was still drivable, barely). I got a new rim and had the tire moved over (no damage). While driving home (about 35 minutes into a 45 minute drive), the dash lit up with ABS sensor, etc. I was using the adaptive cruise up until that point where it shut down. Strange that even when i hit the curb the day before, and during the long drive to get a new wheel, there was never any warning lights.

When I got home, there was definitely brake fluid leaking from the wheel cylinder (sprayed all over the inside wheel well, etc). It seemed like a lot, but the resevoir was still at the max level. The ABS speed sensor thing was chewed up and broken when i took it out (like the tip barely broke). I purchased a replacement wheel cylinder, and the problem persisted! I put the old cylinder back and it passed my tests. Drove it for a while the next day and it's leaking again.

I am going to get a proper wheel cylinder to put on (the autozone one had one of the guid tabs break immediately while installing), but I just want to make sure i'm not missing something. I thought maybe the wheel cylinder got out of alignment or something, but that didn't fix it either.

It's definitely brake fluid and not axle grease. I'm well versed in greasing joints, changing diff fluids, etc (I have a 98 LX470 and I have done a ton of work on it), and this stuff that is leaking is pretty thin. It is blackish/dirty fluid, but I imagine that's just the brake dust mixing in.

I watched the tire guys take off the rim/etc and there were NO signs of ANY fluid or any accidental mechanic damage (i watched the whole ordeal). Totally dry. 30 minutes into the drive home, something happened. I'm baffled. I will get it apart again tomorrow and get some better pictures. I just wanted to start this and see if anyone had any similar experiance or issue.

Thanks in advance!

2018 Tacoma Double Cab 4x4 TRD Off Road with Tech package (radar, etc)
Old Man Emu suspension (heavy duty in rear), with new coilovers


Also, this is my brother in law's truck, i borrowed it for the weekend. But I've installed every mod he has and have fixed it many times.
For pictures, we are selling a pop up camper on craigslist (it just sold today), but there are mostly pics of the truck in the ad, haha. You can also see my LX and how creative I got with that truck camper!
https://orangecounty.craigslist.org/rvs/d/yorba-linda-sunlite-mini-truck-camper/6921371730.html

 

something shifted. or just horrible timing. but i am willing to bet it would not have leaked had you not hit the curb.

 

Also, the rim would have not broken either!
But why would it not start until 20 hours later? I'm going to break it all apart again tomorrow night and get more pics. It's all kind of weird.

 

dirt or chunks could have nicked the boot...?

 

The rubber boots on the wheel cylinder? Possibly.
Also, the tip of the ABS speed sensor was broken off (chewed off, etc).

I put a new sensor in today (morning), reset the codes and it was fine. Bro in law reported the lights did come back on later this evening. Might have chewed the new sensor too (or brake fluid could have gotten in). I'll find out tomorrow.

 

ya, something is eating the sensor.......... removing the drum is the only answer to check

 

If anyone needs a spare rim....I have 3 TRD Off Road rims in mint condition. No one wanted to sell a single rim. I paid $400 for four rims (new rim is $450 from toyota).

 

I did that. The sensor actually plugs into the hub/bearing behind the drum assembly. So that's worrying if a second sensor was chewed up, but i can't confirm until i take it apart again. I assumed the first sensor failed because of fluid leaking, but when i took it out, it was broken. Hopefully this time is just fluid and not a chewed up sensor. Then we're talking brake problems and hub problems.

 

When looking at the hub to brake drum backing attachment point, their are some gaps between the hub and rear drum backing. Looks like the impact had the most force on the upper portion of the wheel/hub. Like the top of the tire/wheel bent in slightly, and not the bottom part bent in. So the camber may be off on the top leaning inwards.

 

Yeah, I think you are spot on. I did all of that, sprayed the crap out of everything. It's definitely leaking from the cylinder. It's not axle fluid. I think I may have received a crappy cylinder from AutoZone (surprise, surprise). I just posted about a slightly bent bearing/hub housing. It looks like it might only be the bearing/hub assembly that is twisted. The axle looks ok and straight compared to the hub. I just have to dig in deeper. The problem is that Southern California is currently experiencing New Orleans type 100* high humidity days. So i'm sitting out in the pacific ocean until it cools down enough to come back home.

So as my German grandmother says, "no brag, just fact".

 

And by the way, you guys are just as great and responsive as my family on Ih8mud.com. Toyota people are pretty cool.

 

in regards to your avatar, my daughter just asked a quetion the other day about "how much do shopping carts cost?" I immediately thought of Bubbles and honestly, I had no idea what they run each. I guess it depends on the model?! lol

Edit: They can cost as little as $150 each and can be over $350 each. Fascinating for sure. Costco carts have to be over $200 each and there are hundreds at each location. I love that random stuff.

 

Wheres it leaking? Replace that


Also wow

 

Man, shopping carts are serious business apparently. lol
I'm totally on board with your thinking. It's definitely going to need a new bearing hub assembly, since i can tell it's tweaked. hopefully that and a new, proper, wheel cylinder will fix it up. I'm just baffled about how much brake fluid is spraying around with little diffrence to the master cylander levels. Hopefully the rear end is ok and just needs a new hub. either way, I'm not going back to Toyota dealers around here. They once checked out the truck and somehow didn't notice that the right rear shock was not connected to the rear axle. It floated around and got dented, but those OME shocks are troopers. Still works fine (initially, I thought it might be a blown shock). Definitely hub/brake related. Thanks!

 

What ever happened to curb feelers?