Stability issues in 5th wheel

JT's or the like. You can also as an experiment just clamp a piece of angle iron or even a 2x4 diagonally from the frame to a stab jack on the rear. Clamp something else from the frame to one of the front landing legs. See if that helps. Also make sure your wheel chocks are firm. X Chocks are sometimes better than just the wedge type.
If the clamped things help then it's work then spend the $$ for some JT Strongarm or any other type.

Another vote for JTs. They took most (but not all) the shake out of ours. Make sure you follow the set up instructions to get maximum stability from them.

JT's JT's JT's.

X 3 Get rid of the slide out support. Just asking for trouble.

X 2 JT Strong Arms

cearly wrote:
We have set slide-out supports under the one hydraulic slide (dining).

Get rid of that.. as said above. A king pin stabilizer also helps.

First off.......

Remove those slide out supports. Slide outs are 'self supporting' and do NOT need supports under them.
Those aftermarket items can cause damage to slide out from the upward pressure especially should RV settle.
They are just a means of getting your RV Monies.
If needed the RV MFG. would have included them with the rig.

And if you think this is just my opinion..check with your RV MFG. about their use

As for stabilizing the rig..

Adding an aftermarket item that DOES help is JT Strong Arms or any other brand.
They are criss-cross supports that go from front landing gear to frame and rear stabilizers to frame.
They remove that side to side sway

X-Chocks between tires both sides ....they help remove that for/aft motion

And one thing I do to make rig more solid:
After rig is leveled side to side and getting ready to unhook truck I run landing gear down several inches THEN drop inner leg and pin them
Less inner leg used---less wobble

I run landing gear until rig is level front to rear
Lower front landing gear 1" below level
Run rear stabilizers down TIGHT
Then run front landing gear back up the 1" to level

Still will have a 'little' motion due to tires/suspension
But you can also place a couple of bottle jacks under frame by wheels to minimize/stop that motion

Moved from 'General'

JT Strong Arms!

Not much other than getting a heavier rv. My cousin has a 40' Allegro Bus diesel pusher and one can still feel, although slight, the motion as people move about the coach. On my TH I have 6 tires, 6 hydraulic jacks, 2 scissor jacks and we still feel someone moving about. You'll get feedback through the tires and springs and the trailer's chassis isn't that stout. Just something to get used to.