Yep, scared the heck out of me. I was very lucky in that I was lowering it onto the jack stands with the wheels still on the truck. The jack stand collapsed and the truck fell straight onto the wheel on that side. I was using a small jack, so I had to reach far under the truck to release the jack, and it came down in an instant!

I had the passenger jack stand on the frame in front of the rear wheel. I had the driver jack stand on the opposing side, in front of the rear wheel and pushed right up against the gas tank. I lifted the support piece and let it down, and it seemed to lock in place, but I was pushing it up close to the gas tank. I don't know if that caused it to lose hold of its latch or what. Also, it could have compounded the problem that I was using a friend's jack and the release of the jack was instant; no slow creep down, it just dropped.

Just a reminder for others... If it is an option for you, leave your wheels on the truck while you are lowering it onto the jack stands.

*Edit to add*
I took a look at the jack stand and it is in perfect/new condition. I jacked the truck up to the same height and put the jack stand back in place, pressed up against the gas tank and locked into place. With my hand pressure alone, I put a quick downward pressure on the jack stand. I was able to reproduce the failure more than once! I will keep the jack stands, but I will be very careful with them. I'll find the brand for you guys.

it failed?...

I can't see how this is even possible unless it wasn't "locked" into place when you raised it. If the teeth aren't sheared off, then that was user error.

I'm curious to see the teeth on these stands. maybe they aren't wide enough or is the locking mechanism at a bad angle with the teeth?

Thats scary, I'm always working on my truck alone & where I live is rural, no one would hear my screams...

If you are able to reproduce the failure, I would not use these... I would contact the manufacturer. Even if they dont replace them (i dont know how old they are) they probably still would like to know of an error with their product...

Thankfully you weren't injured. I try to remember to be careful when working under a vehicle but sometimes stuff happens.

What brand of jack stand? Got any pics? So, the cast piece just fell into the frame, straight down? I thought they were designed to not fail in that manner? Did you check the welds?

Glad you're alright, Scott. That's scary stuff.

Wow, that's kind of terrifying. Glad you're OK.

I've got the northern tool ones with the extra safety bar that slots through. Thought it was a gimmick but glad I have them now I guess.

Dang @ShooterMcGavin you've had a rough go of it the last week or so. Glad you're OK.

I'm with you, there's more to this story than what has been shared.

It's not a one time thing and you are going to keep them? Time to weld them into yard art? Recycle? Return to manufacturer? Time for a safety upgrade.

Kinda confused, you were able to reproduce the collapsing of the jackstand and your keeping it? Toss it man, they are like $30 for a set at harbor freight. Not worth the risk working under something and risking a 5k lb rig falling on you.

I try to always put a tire and blocks of wood to keep the corner I am under up. And for most things under, you can keep the tires on. Lots of ground clearance!

NZDZRT

Seriously bro. You know I clicked hoping to see a picture or maybe a video.

Also, are you talking about a Jack or Jack-stand?

What is the brand and model? Just curious so we can avoid it.

This is exactly why I don't trust those latching/ratcheting jack stands. I have a couple, I use them for light utility duty. Rarely to support a vehicle and never if I'm going to be under it at all.