Originally Posted by philbytx
1. You need to be in tire change mode.
2. Then measure the wheel arch heights, front and rear and note heights and any differential (e.g. 1/2 higher at the front etc).
3. Measure your trailer front and rear using a constant (the frame?)
4. Put trailer on hitch ball.
5. Install WDH so that the front and rear measurements are, as near as dammit) consistent with 2. above. You will have more weight which will probably reflect in lower heights than in 2. above. You need to ensure that you see the same differential (e.g 1/2" higher at the front).
6. Measure your trailer height again, as in 3. above. You want to see it the same or slightly lower on the front.
7. To help with 6. Use a carpenters level on the trailer, using the top of the external fridge outlet. Which is usually square to the frame.
8. Once you have it set up, you THEN put the QL back into normal mode.
Thanks for your reply to my post.
I finished (I think) the job today, and here's my results. Perhaps someone here can tell me if I set things up correct or if I should make some changes...
1. The manual doesn't say how to disable QL and how to put it into tire change mode, so I had to research that one out. Press the up and down buttons simultaneously until the DID says that QL is disabled.
I found that I had to make sure the QL was in normal ride height before going into tire change mode, since it could also be in entry/exit mode which is lower.
2. I measured the wheel well height front and back with nothing hitched. 34 3/4 Rear, 33 3/4 Front.
3. From measurements I found that I had about 3 ball heights available to me on the hitch. I hitched the trailer with the lowest height and connected the WD arms.
4. I found that I had to drive the setup around the block to enable normal ride height with QL and let the auto leveling kick in to get real measurements, and then I placed the GC in tire change mode again.
5. Ball height in low position, GC Front 33 1/2 Rear 34 3/4. Trailer Rear 18 Front 17.
6. I moved up to the 2nd ball height, about 1" higher and repeated #4. GC Front 33 1/2 Rear 34 3/4. Trailer Rear 17 1/2 Front 18.
7. I moved up to the 3rd ball height, about 1" higher and repeated #4. GC Front 33 1/4 Rear 34 1/4. Trailer Rear 17 Front 18 1/2.
8. I relocated the ball to the lower position described in #5 thinking that should be the position to keep.
I haven't had a chance to get on the road with the setup, but does the #5 position sound about right to those of you who have done this sort of thing?
Did I do correct by letting the auto leveling and the QL kick in before taking measurements?
Will Aero mode change the setup significantly so that I should plan a different setup to compensate?
Does anyone here have any recommendations or alternatives or suggestions?
(I'm totally open to someone saying that I botched it up and should start over)...
I should mention that this was done with the water tank empty and the trailer and the GC partially loaded, but there are some things that we would put in when we hit the road. Probably nothing of a major weight increase. I'll recheck the measurements after loading just to be sure. (Water tank is over the axles, BW-GW holding tanks are behind).
Last question, how do I make sure that the trailer tires (double axle) are equally balanced in load from front to rear?
Thanks to everyone for the help.