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Old 05-26-2015, 03:14 PM   #31
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You may just be experiencing a normal ride with the TT hitched up. First time down the road with our 35' TT we were freaked out when we hit a section of undulating road! We thought we were going to wreck! Now we travel that area and rarely even think about it; you will soon become accustomed to what feels "normal" when towing and what is really an issue. Certainly look into the things the folks have mentioned previously, but do the quick and easy thing first and just tighten up the hitch links. Then take the TT out and just drive it around on local highways and roads to see if the bouncing or porpoising is still a big issue for you. And tire pressure, ALWAYS check your tire pressures on the tow vehicle and trailer before you go anywhere; even multiple times on a long day of driving. There are multiple links and threads in this forum about exactly this issue with lots of advice and experiences related.
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Old 05-26-2015, 04:08 PM   #32
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Buzzard....take it to an RV dealer and have them check it out. There are way too many variables, and the ramifications of not catching the problem can be cataclysmic.
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Old 05-26-2015, 04:12 PM   #33
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Buzzard....take it to an RV dealer and have them check it out. There are way too many variables, and the ramifications of not catching the problem can be cataclysmic.
Problem with that is that the dealers are the ones that typically install them incorrectly. Unfortunately.
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Old 05-26-2015, 04:13 PM   #34
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Buzzard....take it to an RV dealer and have them check it out. There are way too many variables, and the ramifications of not catching the problem can be cataclysmic.
That only works when the tech at the dealer has a clue about setting the WDH up.

A quick site search will net more than a couple of users who had to sit down and read the manual for their hitch and reset it after the dealer got it wrong.
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Old 05-26-2015, 04:42 PM   #35
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Problem with that is that the dealers are the ones that typically install them incorrectly. Unfortunately.
That is what happened to me when they replaced the head on my Trekker hitch, the rear of the truck went down 4" and the front went up 1 -1/2". I had to get it on level ground and adjust it correctly myself. Invest in a Harbor Freight electric impact wrench to work on the bolts.
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Old 05-26-2015, 11:34 PM   #36
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That's a lot of trailer for a Navigator.
1. Make sure your tires are inflated to a pressure somewhere between what's printed on the Navigator door and what the maximum PSI for the tire is.
2. Loosen the WDH one link.

If that doesn't help, 3 replace your rear shocks with the stiffest aftermarkets you can find.

4. Some LT series tires would help.

5. Shorter trailer or bigger truck
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Old 05-27-2015, 12:01 AM   #37
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Another vote for air bags. I towed my 6500lb TT with a Toyota Sequoia which had plenty of power, but the coil suspension, short wheelbase and low payload (1300 lbs) resulted in some "porpoising" or bucking of the ride. I was probably over payload with a 800lb tongue weight and several persons in the SUV. I used an Equal-I-zer WDH with anti-sway and 1000lb bars. The air bags helped a bit in stabilizing the load.

My solution was to go to a F-250 which has stiffer rear suspension, longer wheelbase and a payload of 3200 lbs, with the same WDH. I also added Timbrens which helped a bit more with heavy loads. No more porpoising and a very steady ride.
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Old 05-27-2015, 01:24 AM   #38
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I will tell you from experience most dealers have no clue how to set up a wdh properly let alone set it up when you have load leveling suspension. Having been there done that I will tell you learn all you can about setting up your hitch and then you will understand what changes do what and how to make certain issues go away. As stated before, start easy with wdh adjustments and figuring out if you have enough payload. Next would be the tire switch out (this never did do much for my handling issues) then upgrade hitch or TV. Best of luck, let us know what your fix was.

Here are some help on wdh but they don't discuss the load leveling suspension. The guys who wrote these stickies are the ones who figured out how to best fix my wdh with load leveling suspension.

wdh set up

how wdh works

here is the last in a long series of threads designed to fix my first set up of Armada and TT. Pay the most attention to the responses from Ron gratz and jbarca as they are the ones that figured it out.
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Old 05-27-2015, 08:36 PM   #39
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You were sotra right, the coil springs will give you a bounce, but the 20" tires will be very stiff! All of these big wheel tires have a very low tow rating, so as said before you will have to bite the bullet and replace the wheel and tire combo to fix the problem.
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Old 05-27-2015, 10:10 PM   #40
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The 20" rim LT285/60/20E's that I have on my Ram are rated for 3640 pounds each at 80 psi and they are stiff. Cuts down on squirm and sway, but the ride is a little harsher.
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