Originally Posted by North of 49°
The dealer size they would set up the hitch for me for $75. Too rich for my blood, especially since I can do it myself. But what I will do is email the salesman, explain the problem to him and make him run out to their lot with a tape measure, and I won't accept 31" for an answer.
make sure you have him LEVEL the trailer on a LEVEL piece of asphalt/ground, then have him measure from the ground to the top of the coupler.
Adjust your hitch to get the top of your hitch ball to be 1 to 1.5" higher. The truck will then squat 2" or so after you hook up. You will then get some of that squat back after you hook up the WD bars. Tilt the hitch head to ensure that bars will be parallel with the trailer tongue when under tension. (at least on my REESE WD hitch).
In the end, the trailer should be level or SLIGHTLY nose down, and your truck should be level (w/in 1/2" at the wheel wells when compared to unloaded heights.)
other than that, contact JAYCO directly and get the specs from their tech department.