Would it be solid enough to jack up the jeep using a shackle mounted on an aftermarket bumper tab

 

There is the potential for the jack to move and the entire vehicle to shift. It can be done, but it would be a last resort for me.

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Same here.... It's a last ditch effort.... They're very dangerous. U have to be careful while using

 

I have done it, but I would agree with previous posts. It wasn't that stable!

 

It should be solid enough.

Hi-Lifts aren't very useful and they are dangerous. I wish i didn't buy one. A scissor jack under the axle is probably best. A bottle jack modified with a an angle iron in a "V" on the top may be more useful.
I jacked up my Jeep by the slider with a Hi-Lift to test out my welds. That was the only use. It can also be used as a poor-mans winch.

 

It's strong enough.Used ours a number of times to jack up our rig from flat surfaces to off camber hillsides without any problems.Makes a great winch too

 

You have a picture of this tab?

And it's a good idea to get familiar with it as much a possible. I use Hi-Lift (on bumper) to put the jeep on jack stands when I rotate my tires. PS: I keep my on my Jeep, so it gets rusty/stuck if I don't....

 

You'd be better off with a bottle jack under the axle if you're goal is to get on jack stands. You'll have to lift extra to compensate for suspension.

I bought my hi lift pretty much to pull me along if the winch breaks or if I get stuck and have to pull out backward (no winch in the back). Actually lifting the jeep to change a tire is the bottom of my list unless it's the only way...

 

They work good to lift a tire up to stack something underneath the tire for traction. For changing a tire you for sure would want to make sure the jeep was stable and would not move. either way you need a strap wrapped around to keep the suspension from sagging otherwise you will have to really lift the vehicle to get a tire off the ground.