Jayco Seneca Super C JRide

According to the Jayco website, your 2017 Seneca on the freightliner chassis has air bags in the rear as part of the "premium J- ride" package. Is there a way to air the bags down a bit? Maybe that could be contributing to the harsh ride. And also, is there any weight on the chassis? Like tools, water, fuel, general stuff in the storage bins? I am thinking about how a unloaded and empty UHaul trailer will bounce while towing it, and once it has weight in it, is so much more behaved.. Just a thought

It's on a Freight Liner truck chassis, so the fuel tanks are under the cab.
I understand the weight and balance issue you can have carrying to much water and locations of the tanks. The tire pressure has been corrected. I'll check on the helper springs.When things are falling of the walls and clothes falling do in the closet just on a normal highway with minimum bumps. It rides really rough. I just don't think should be normal for a brand new coach. Thanks

az99 wrote:
Check the tire pressure and set to tire mfg. pressure for your actual load. Many dealers set them to 120 when they should really be at 80.

X2 And I set the front tire pressure lower than the dualls.

Also, Did you buy a longer C than your other one? Are all the tanks located in the same place? Are you test driving it and comparing it to your old one with all the tanks empty?

For me how much gas and or water you carry, if the tanks are all in the rear, will affect the ride.

I pretty much can tell when I am getting low on fuel without looking at my fuel gauge on how rough the ride starts getting.

Check the tire pressure and set to tire mfg. pressure for your actual load. Many dealers set them to 120 when they should really be at 80.

Google "jayco J ride problems" you will find that Moryde does the suspension modifications to the stock ford frames before the factory builds the coach portion. I know you are probably not on the Ford chassis, but..... many of the rear suspension Hellwig helper springs are set up incorrectly for the weight of the finished coach. It seems like most are set up too soft. Not sure if that would make for the ride you are experiencing. But according to a Hellwig rep i spoke to on my 2006 jayco greyhawk 31ss, the helper spring should be no more than 2 - 1 1/2 inches from the stock ford spring pack. (mine is 4 inches, but im ok with the ride) Check your rear springs to see how far the end of the helper springs are away from the stock springs.