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RollingRocker

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Endeavoring to find a way to have the whole back of my 4runner be level with the seats folded down I decided to try and build a platform. I love the way my wife's highlander folds completely flat when the seats are down. It facilitates hauling crap around so much better than the way my 4runner does. I wanted to simply build a frame and then lay plywood across it and the over the seats up to the back of the front seats. Being an expereinced DYIer with loads of wood working experience my first thought was to build it out of plywood. The issue with this is the weight and bulkiness of framing it out. I want to be able to pull it out and stash it without a lot of effort.

A couple years ago when I rebuilt our deck the railing was all made out of aluminum and I loved how it turned out. I was able to cut it with my Milwaukee miter saw using a blade suitable for aluminum. It was easy to work with and it was absolutely square and lightweight. At the local makers space they use a lot of 2020 extruded aluminum to build frames for the robotics club. It looked pretty straight forward and it is relatively affordable so I decided that would be a ticket. The guys down there were helpful and gave me the amazon links they use to get the material and the little hardware kits. Apparently it can support up to 2300 lbs or something so it's tough stuff.

Now, I am a complete noob when it comes to working with metal and I have definitely learned a few lessons on this project. You can't think like a wood worker when you're using this stuff it's like building legos. If I had take that into consideration it would have been far less of a learning curve. The hardware required is diverse and you really have to puzzle it all out as you go. That being said I would definitely do it differently had I known what I know now. I wouldn't use the 2020 that they use at the makers space it works but it isn't ideal. I would use 8020 which I learned is more industrial and people build their camper vans out of it. By the time I waded into this I had gone too far down the path to change my material. So I am stuck with the 2020 unless I scrap it all and start over and that is not happening.

I also evolved this project from just being a platform to being more modular. I want to be able to stick my ICECO fridge back there and also have a locking drawer to keep my work tools and camera gear out of sight and more secure. I took some measurements and jumped on my drafting program and came up with this design. I measured everything to account for the 3/16" the 3 way corner brackets require to fit and create the joints. On the top view that is the thicker black lines in the corners. Turns out there are square 3 way connectors that make this way easier that I didn't find out about unit I was already collating crap together.

This also sits higher up against the back seats so that when the 3/4" plywood is connected it rests on the seats and is level with the plywood that is part of the drawer system. I've also had to double up the frame on the bottom so that the drawer can clear the rear bottom trim.
2025 Toyota 4runner DIY Cargo Drawer System and Leveling Platform for Cargo Area IMG_2531


2025 Toyota 4runner DIY Cargo Drawer System and Leveling Platform for Cargo Area Image 6-15-25 at 12.29 AM




UPDATE WITH FINAL PAINTED FORM:

I also have everything painted and mounted ready to go. Just have to tie down the fridge and chase rattles which.


IMG_2628.jpeg
IMG_2624.jpeg
IMG_2625.jpeg
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RogueWarrior65

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Very nice. I'm building something similar. Can you list the 80/20 parts you're using?
I'm keeping it simple by not using drawers and using Home Depot Husky storage boxes instead. I need to be able to access the air pump in my Trailhunter.
 
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RollingRocker

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Very nice. I'm building something similar. Can you list the 80/20 parts you're using?
I'm keeping it simple by not using drawers and using Home Depot Husky storage boxes instead. I need to be able to access the air pump in my Trailhunter.
Absolutely, I will get a parts list together once I have it basically done so I don’t include any extraneous or forget anything. I used 2020 not knowing initially what would be best. But I will list the 8020 instead of what I used as it would be better for this.
 
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RollingRocker

RollingRocker

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I still have to router out the spot where the fridge will go and cut the material that will be the slide out base for it. I’m am waiting for another set of drawer slide to use for that so I won’t be finished with that until later in the week.
 
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RollingRocker

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I was able to get the drawer front painted and lined the bottom of the drawer. I routed out the location for the fridge and also drilled all the mounting holes for the top plate. Waiting on the m5-.08 x 25mm flat head hex bolts to arrive so I can permanently attach it. Also waiting on the bottom mount drawer slides for the fridge slider. Once all that is marked out and attached I can take it apart and paint the rest of the wood.
2025 Toyota 4runner DIY Cargo Drawer System and Leveling Platform for Cargo Area IMG_2607
2025 Toyota 4runner DIY Cargo Drawer System and Leveling Platform for Cargo Area IMG_2611
2025 Toyota 4runner DIY Cargo Drawer System and Leveling Platform for Cargo Area IMG_2606
2025 Toyota 4runner DIY Cargo Drawer System and Leveling Platform for Cargo Area IMG_2609
2025 Toyota 4runner DIY Cargo Drawer System and Leveling Platform for Cargo Area IMG_2608
 
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RollingRocker

RollingRocker

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Some detail shots of the hardware I used to connect the 2020 extrusions. Using the 8020 would result in far less hardware to achieve the same results.
2025 Toyota 4runner DIY Cargo Drawer System and Leveling Platform for Cargo Area IMG_2594
2025 Toyota 4runner DIY Cargo Drawer System and Leveling Platform for Cargo Area IMG_2592
2025 Toyota 4runner DIY Cargo Drawer System and Leveling Platform for Cargo Area IMG_2599
2025 Toyota 4runner DIY Cargo Drawer System and Leveling Platform for Cargo Area IMG_2595
 

Trailhunter4R

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Love seeing DIY projects like this. Nothing better than a bespoke system to your own specific needs. Is painting the rest of the wood the last step in the project?
 

beanmachine

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Do your rear seats fold back and recline still? I’m building my own right now and I thought 40” would have been too long.
 
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RollingRocker

RollingRocker

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Do your rear seats fold back and recline still? I’m building my own right now and I thought 40” would have been too long.
The rear seats still recline but not all the way with this installed. I rarely have any passengers back there which is why I didn’t go shorter. Around 38” with an overall height of 11” would allow for full reclining. 40” is the absolute max especially with the height being around 12”. I had some specific goals with the storage drawer and needed the extra length and height to make them work.
 
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RollingRocker

RollingRocker

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My plans now. I might need to shorten the depth some. the block on the lower right are the seats folded down. Made in Rhino.
Screenshot 2025-06-18 at 9.29.13 PM.jpg
This looks amazing. 44" wide is perfect and the 12.75" High brings the top plate right to the bottoms of the 3rd row cup holders. It's very snug but it locks everything in nicely. I would shorten the overall length by an inch or two if you're wanting more reclining in the rear seats. I jumped back there after I got everything bolted in tonight and it's comfortable. I wasn't forced to sit straight up but I do prefer it a bit more reclined. If I was riding back there for a long road trip I'd probably get frustrated with it.

Also you need 1.5"-1.75" from the floor of the rear cargo area to clear the molding along the back of the door. I had to add an extra piece of 2020 to the bottom all the way around to allow the drawer to open.

I will post updated pictures in the morning once it is light out. I just finished getting everything locked in about an hour ago.
 
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beanmachine

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This looks amazing. 44" wide is perfect and the 12.75" High brings the top plate right to the bottoms of the 3rd row cup holders. It's very snug but it locks everything in nicely. I would shorten the overall length by an inch or two if you're wanting more reclining in the rear seats. I jumped back there after I got everything bolted in tonight and it's comfortable. I wasn't forced to sit straight up but I do prefer it a bit more reclined. If I was riding back there for a long road trip I'd probably get frustrated with it.

Also you need 1.5"-1.75" from the floor of the rear cargo area to clear the molding along the back of the door. I had to add an extra piece of 2020 to the bottom all the way around to allow the drawer to open.

I will post updated pictures in the morning once it is light out. I just finished getting everything locked in about an hour ago.
2025 Toyota 4runner DIY Cargo Drawer System and Leveling Platform for Cargo Area Screenshot 2025-06-19 at 9.02.24 AM
I have accounted for that rise. The long skinny box on the lower left represents the plastic trim at the back of the cargo area. I am going to change the length to 39". I was designing this then came onto the website and saw your build and was very excited!
 
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RollingRocker

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Screenshot 2025-06-19 at 9.02.24 AM.jpg
I have accounted for that rise. The long skinny box on the lower left represents the plastic trim at the back of the cargo area. I am going to change the length to 39". I was designing this then came onto the website and saw your build and was very excited!
Thats perfect. Having that extra space under there is actually useful. I can store my snow peak iron grill table pieces under the drawer since I only need them once we get to camp. It's very handy as that thing is bulky. To get it in there I have to pull the drawer father out and then it just slides right in. Having an extra 1/2" is going to give you even more flexibility.

I am glad you're finding my post useful. That's why I love the forums.
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