Four big grade 5 bolts right through it.

 

Gimme a few days for the pics.... Gotta grab a camera for the girlfriend. Really, really easy. ill post some info on it too along with the pics. I followed a thread in the write up section of this forum as well

 

Point taken!

 

Here is what I have. It fits between the wheel wells, and still allows me to access the in floor storage cubby. The back side of the box is tapered to match the contour of the rear seats. Attachment 417340

 

Here's the locking steel box I bolted to the trunk floor on my 4-door in 2008. It's big enough to securely hold plenty of tools and all my winch accessories and trail gear, and small enough so I can continue to use the remaining trunk space and still open the stock rear cubby. Black powder-coated 37lb steel box cost $120 + $25 shipping from Northern Tool. The box has handles on both sides, so great for securing other gear around and on top of the box with ratchet straps or bungee cords.



Positioning the box on the trunk floor needs to be thought out - mine is set back in the trunk so can continue to use the stock cubby, box is positioned 6" inches forward of the rear seats so box lid leans back far enough to stay open and rests on the rear seat backs, has room to secure an axe and hiking gear behind it, and box is positioned slightly left of center so the floor bolts avoid the suspension springs and rear axle.

I drilled four 1/4 inch holes in the box corners and through the JK's floor, pushed 4" long domed-top Carriage Bolts with washers up from the JK's underside through the trunk floor into the toolbox, secured with washers and nuts on the inside on the box. The box cannot be removed unless its open.

To prevent rattling the box comes with a rubber pad on the inside floor, and I added a plastic-coated padlock. Coming up on 5 years, and still used frequently.

 

Not sure how much stuff you are looking to put back there. I built this box with the thought of having a small space for secure storage and being able to use the stock cubby at the same time. Also doesn't stick out with the top off.

 

Good idea!

 

I really like the idea of the Mac's Jeep Black Box.

Mac's 702010 - Mac's Black Box Storage Box for 07-13 Jeep® Wrangler Unlimited JK 4 Door - Quadratec

You can lock it in, or take it out if you need to carry something bigger. I'll be getting on of these as soon as I can.

 

I really like your creation. I would like to do something similar. Do you have this bolted down? Or does it simply sit in the back? Thanks for the pics.

 

I do like that box. But a thousand bucks will buy some much needed body armor for my rig. I would like to build something similar for a fraction of the cost.