I have 2 WK2s, and have owned 3 total. Our first was a '16 High Altitude (5.7 Hemi) which we sold and regretted that, our 2nd and the wife's current daily is a '18 Trackhawk (6.2 Supercharged), and I just picked up a '17 Trailhawk (5.7 Hemi) for use with my teardrop trailer and as my DD. Needless to say, I love WK2s. The '16 and the '17 had/have the air suspension, the Trackhawk of course does not. As a DD they're just really, really good vehicles. They have their little issues (the '16 and '17 had/have the pano sunroof, it seems they all rattle a little sooner or later, our Trackhawk we got without it) but are overall very reliable vehicles. They're very comfortable (the Trailhawk and Trackhawk seats are a bit better than what's available in the other trims, IMHO), are pretty feature-loaded, and are priced right (I paid ~34k for my '17 Trailhawk with the Trailhawk Luxury Group and the 5.7 with ~27k miles on it).
One thing I will say though, is you should reconsider the 3.6. It's a good motor, and gets the job done, but the Hemi is so much better suited to the WK2. The WK2 is heavy, and the Hemi's torque is really better matched to the vehicle. Yes, the 8 speed is a tremendous trans and really helps the 3.6 get the job done, but it's just not the 'best' drivetrain for it. Plus, if you go Hemi you get the HD brakes, as well as the 8HP70 trans (vs. the 8HP50 with the 3.6) as well as the bigger diffs from the SRT (the regular NA 6.4 SRT, not the 6.2 SC Trackhawk's diffs). In the real world, MPG is very, very close between the 3.6 and the 5.7. Back before we got the '16 we test-drove all 3 engine options (3.6, 5.7, and Ecodiesel) on the same extended loop with a mix of freeway and city, and found the 5.7 actually got a bit better MPG with our driving, in that loop. We would regularly get 24-25 MPG on pure freeway runs with the '16.
I just did about 800 miles going from North to South through almost all of Idaho from the Canadian border down to the Boise area, nearly all off road in my Trailhawk w/ the teardrop. Average economy on the whole trip was like 12-13 MPG... but the trailer is nearly 3k lbs and almost the whole trip was up/down big mountains. The WK2 was exceptionally comfortable, and extremely well suited for the job. There was nothing extreme or technical, but some pretty steep rocky sections it had no issue with. Personally, I loved having the air suspension so I could adjust it to the terrain... but also it made it easier to level the trailer each night (we moved every day, and often setup camp after dark... so I wasn't unhitching and deploying the jacks on the trailer).
That said... with 2 miles to go back to pavement I got an air suspension fault.
This was 100% my fault... I had installed 'lift rods' to level the front and they were a terrible design with little clips that were impossible to install and got lost easily... so I was missing 2 clips. My passenger side rod came off at the sensor, which of course confused the air suspension. It wouldn't be an issue had I left it alone, or got all the stuipid clips on, or used a better designed rod. Of course, now the front susp is leaking down overnight so I suspect I damaged a bag. Again, entirely my fault and I STILL would recommend the air suspension... just my real-world experience.
Playing around at Hollister Hills with the Trailhawk:
(note in that last vid if I had rolled just sliiiiightly faster it would have walked right up but I was still learning the rig, also I forgot to put it in Rock Crawl mode for all of that stuff)
Towing the trailer off road:
Trailhawk and trailer:
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Trackhawk:
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And the '16 High Altitude:
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-TJ
PS- I still have the WJ, it's grown a bit and occasionally gets trailer duty too:
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