I have solved the same problem
My Gulf Stream is very old but system is similar. Mine was tight at top and out at the bottom about 1/2 inch. The "jamnut" on the center hydraulic ram pushrod solved the problem on mine. About a turn on the nut did the trick. Seems like the secret to keeping the slide working is lube of the moving parts with non-grease product like silicone, and cleaning the side seals/wiping with silicone. Slide is over 20 years old and still working great.
jh
[QUOTE=2019 255BH Newbie;27481]I have a 2019 255BH and when I got it home from the dealer who is 3.5 hours away, I notice the bottom of my
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