My neighbors think I love my dog too much LOL Last year in my 2 door wrangler, I took the back seat out and put a nice soft blanket down. Right behind the front seats, I put a wire cage barrier and installed a fan on it. I installed a tie down with a carabiner for his leash. All I can say is with the AC vents aimed directly at the fan in the center, Jonas Loved sitting back there. It was cooler in the back then it was in the front. This September I traded my 2 door in and Ordered a 4 door. "yep pretty much for Jonas" Wow what a difference! My neighbor even thinks I am more nuts now.
The seats fold down and there is so much more room. He just lays back there and enjoys the ride now. BTW Doggiedad I love the name of your German Shepherd. Loki rocks!