An empty 2H LQ trailer would be a little tongue heavy on the truck, especially if the trailer axles are placed way back. If, this is the case, once you load the horses in, you will find the ride much smoother. 

Most of the time, a gooseneck trailer IS alot smoother ride than a tagalong. But, axle placement and weight distribution go hand in hand to acheive that.

A 2h GN trailer with a LQ can place a great deal of weight on the rear axle of your truck. Depending on the model, your truck's suspension may be cycling on its overload springs or striking the suspension stops, when uneven roads effect the ride. This can result in the "bouncing" you have noticed.

The next time your rig is hooked up and secured, check to see how much rear suspension travel is left. If it is minimal and you are near to the stops, you might have to consider auxillary suspension devices, such as air bags, air shocks or Timbrens to level your ride. You should also check the serviceability of your rear shocks. If they have more than 30K miles of wear, they may not be up to this additional task, and may need to be replaced. Make sure your truck tires are properly inflated.

Also make sure the trailer tires are properly inflated. Many owners use the maximum pressure indicated by the tires' manufacturers, which are indicated on the sidewalls. If the pressures are lowered, the trailer will pull harder, and any uneven roads will become more noticeable as a result. Most newer trailers are equipped with radial tires. Some are not and an upgrade to them can be most beneficial. You will realise an improved ride, less squirm, better longevity and fuel mileage, because of their lowered rolling resistance.

I brought a new to me trailer home once (lights worked, all seemed fine) but it was *very* hard to back into the spot I wanted it at home.  In fact, it didn't back at all....until I disconnected the electricial plug from the truck.  The the brakes were locking up when the reverse lights came on on the truck.  Probably not your issue since you were likely going forward when you pulled from ga to tn, but maybe a short or something could be applying the brakes at some level occasionally while pulling?  just a thought

I found a solution to this problem by installing an air cushion hitch in place of my B & W hitch ball. These units are really effective at isolating the bumps and shocks from being transmitted to the trailer and the other way around too.  I couldn't believe how much it smoothed out the ride.

It's got to help smooth the ride for our horses in our gooseneck 4Star trailer.

I did a lot of research on line looking at various air hitches but was discouraged by the high prices until I found this one at a company called Greenwood Equine Equipment for just $449.00! It is easy to install and just drops into your existing hitch in place of your current hitch stub.  only takes a few minutes to install and just stays on the truck.

If anybody's interested their website is www.greenwoodequip.com

http://mrtrailer.com/cody.htm

I looked at a few of these online tonight,the Air Safe ($$$) and the Trailer Saver,etc.Found the Cody hitch last,and it is the most reasonably priced.The others are running upwards to $1000.

Anybody have the others,or,any other Cody Hitch owners besides Hoss with opinions? Thanks.

The cody hitch looks like it uses an air spring.  You might have to increase the air pressure when you're heavily loaded.  Use the air valve on top of the bladder to adjust the air pressure.