i always wondered about that too not too big of a bolt holding up such a weight, i read a guy tag welded it to the frame just to be sure hehe

marc

 

When I got to the passenger side seat, I easily could have snapped off the bolt that goes through, but since I realized it went through the bottom of the Jeep (having broken the driver's side), I used the blowtorch to heat it up, loosen a little, heat it up, loosen a little and got it out.
I will be using new hardware and a generous helping of anti-seize when putting it back together!!!!

 

This was definitely a situation where I lamented my lack of welding skills and equipment.

I have to think that the front bolts hold the weight. The transmission and transfer case are only something like 150-160lbs.. plus the cross-member isn't that heavy.
My TJ had a massive skid plate that was probably 80-100 lbs by itself and it was held on with 6 bolts. When my frame rusted out, I drove the TJ several miles with only one side of that plate connected and it drove that distance without the tranny/transfer case falling out.