Guys, I traded my 2015 Overland for a new Trailhawk on Wednesday and am already making small modifications. First step was to start playing around with the links for the air suspension and I have some interesting news to share. The Trailhawk links are different than the links that I had on my Overland. The front links now have plastic ball sockets and a straight metal rod. On my Overland, the entire link was metal and it had a bend in it. The balls are still 8mm and they are still metal, so that hasn't changed.
Anyway, I popped off the stock links in the front and found them to be 101mm from ball socket center to ball socket center. They pop off quite easily by grabbing them just below the ball socket end with a needle nose and giving a little twist. Then the lower one can be popped off by hand, but make sure you support the sensor arm with your other hand because it's plastic and looks like it could be easily broken if you're not careful. Just make sure you pop the top one off first because it's in the upper control arm and you aren't going to bend anything up there.
So now for the leveling measurements. I used the same parts that were listed in this thread:
http://www.jeepgarage.org/f156/quadralift-lowering-leveling-lifting-links-diy-91566.html
Like I said, the ball sockets are still 8mm, so no worries there. Here are some measurements that you can use if you want to do something similar to what I did. To raise the front of your Trailhawk to be exactly level with the rear (I measured several times from the fender to the ground while experimenting), you need to go from 101mm overall link length (again, ball socket center to ball socket center) to 95mm. Here's the good news---on the Trailhawk, you can keep your front suspension set like this and ALL suspension settings still work, including ORII. In my Overland, ORII would not work. The suspension would just not have enough travel to reach ORII height with a 6mm shorter link. So interestingly, it seems that at least the front suspension does have some extra travel in the Trailhawk.
Ultimately, I decided that I didn't really like a completely level look, so I adjusted the link length to 96.5mm, which gave me a tiny bit of rake, which looks much better to me. Based on my measurements, every 1mm is equal to about 1/5 of an inch. The nice thing about the threaded rod that I used to make the links is that one full turn of the ball socket end will change the overall length exactly 1mm. So it's completely adjustable to fine tune it to your preference. And by the way, if you decide to make your own links, cut the rod to 73mm and you'll be at right around 95mm with the ball socket ends tightened all the way in, but you can obviously spin them out to gain 1mm in length and still have plenty of thread left without worrying about the ball socket coming off. Also make sure you don't tighten down the ball socket ends. Leave them loose so that they can slightly rotate as the suspensions moves. The factory links are made so they can rotate as well. You might also want to put a dab of light grease in the ball socket ends and the threaded rod where it goes into the ball socket ends.
The picture of my Trailhawk is in Park/Exit mode. I just snapped that pic out back at work today. The ground isn't exactly level, but trust me, it looks so much better with the front end lifted up a bit. I can take more pics of the suspension at various different heights if anyone wants to see them.
Anyway, I popped off the stock links in the front and found them to be 101mm from ball socket center to ball socket center. They pop off quite easily by grabbing them just below the ball socket end with a needle nose and giving a little twist. Then the lower one can be popped off by hand, but make sure you support the sensor arm with your other hand because it's plastic and looks like it could be easily broken if you're not careful. Just make sure you pop the top one off first because it's in the upper control arm and you aren't going to bend anything up there.
So now for the leveling measurements. I used the same parts that were listed in this thread:
http://www.jeepgarage.org/f156/quadralift-lowering-leveling-lifting-links-diy-91566.html
Like I said, the ball sockets are still 8mm, so no worries there. Here are some measurements that you can use if you want to do something similar to what I did. To raise the front of your Trailhawk to be exactly level with the rear (I measured several times from the fender to the ground while experimenting), you need to go from 101mm overall link length (again, ball socket center to ball socket center) to 95mm. Here's the good news---on the Trailhawk, you can keep your front suspension set like this and ALL suspension settings still work, including ORII. In my Overland, ORII would not work. The suspension would just not have enough travel to reach ORII height with a 6mm shorter link. So interestingly, it seems that at least the front suspension does have some extra travel in the Trailhawk.
Ultimately, I decided that I didn't really like a completely level look, so I adjusted the link length to 96.5mm, which gave me a tiny bit of rake, which looks much better to me. Based on my measurements, every 1mm is equal to about 1/5 of an inch. The nice thing about the threaded rod that I used to make the links is that one full turn of the ball socket end will change the overall length exactly 1mm. So it's completely adjustable to fine tune it to your preference. And by the way, if you decide to make your own links, cut the rod to 73mm and you'll be at right around 95mm with the ball socket ends tightened all the way in, but you can obviously spin them out to gain 1mm in length and still have plenty of thread left without worrying about the ball socket coming off. Also make sure you don't tighten down the ball socket ends. Leave them loose so that they can slightly rotate as the suspensions moves. The factory links are made so they can rotate as well. You might also want to put a dab of light grease in the ball socket ends and the threaded rod where it goes into the ball socket ends.
The picture of my Trailhawk is in Park/Exit mode. I just snapped that pic out back at work today. The ground isn't exactly level, but trust me, it looks so much better with the front end lifted up a bit. I can take more pics of the suspension at various different heights if anyone wants to see them.