I have been playing with he idea of replacing my side sub-woofer for a while.. And really I was jut out on the Junk-yard hunting for odds and ends when I came across a range rover LR3. Anyhow I found that they put a 10" sub in the drop down tailgate part covered by a simple carpet with clips just like in our 80's... The LR3 tailgate is tiny compared to the tailgate on our 80's and they used a very shallow sub in there that was sun and water rotted so I am not using that.. Anyhow I disassembled it and got the metal grill bracket piece that holds the 10" Sub in the LR3 it is obviously strong enough to stand on.. 
I also ordered the 10" Sub PIONEER TS-SW2502S4 10-Inch which has a 3-1/8" mounting depth So I am hoping there is at least 4" at the deepest part of the tailgate.. ((( CAN ANYONE WITH A TAILGATE STORAGE DOOR TAKE A DEPTH MEASUREMENT? )))
Speaker should be delivered this week, and next week then I can decide if I will install in tailgate or revert to the original plan and put it in the stock rear PS side wall location..
Thoughts? Help with max depth in that area? Do I have at least 4" at the deepest area?
My plan is to dynamite the entire inside of the tailgate and use the LR3 bracket to mount the sub, it's more than strong enough to stand on.. and clip / mount the carpet on top of it for a total stealth / hidden install. Some pics of what I am working with..

I also ordered the 10" Sub PIONEER TS-SW2502S4 10-Inch which has a 3-1/8" mounting depth So I am hoping there is at least 4" at the deepest part of the tailgate.. ((( CAN ANYONE WITH A TAILGATE STORAGE DOOR TAKE A DEPTH MEASUREMENT? )))
Speaker should be delivered this week, and next week then I can decide if I will install in tailgate or revert to the original plan and put it in the stock rear PS side wall location..
Thoughts? Help with max depth in that area? Do I have at least 4" at the deepest area?

My plan is to dynamite the entire inside of the tailgate and use the LR3 bracket to mount the sub, it's more than strong enough to stand on.. and clip / mount the carpet on top of it for a total stealth / hidden install. Some pics of what I am working with..
, and I am slower.. That said I am supposed to be in cognitive therapy, but with the corona virus... We will see when that will happen.
Snaked the cable from the amp to under the truck following some other cables that go down then over and into the same rubber piece that connects the tailgate to the truck then inside the tailgate over to the sub. Anyhow the wires are inside the rubber piece carrying the other cables that go to the tailgate.. So it's in there like an OEM cable. I also taped them down inside the tailgate and put them under the sound insulation were I could to minimize rattling.