Eddie, be very careful about over adjusting the hydraulic slide assmy. Most all of them will have this slack that you have talked about. The reason is that the stroke of the piston is a close length to the depth of the slide out but over by a few inches. If you over adjust the hydraulic pressure and length of ram will break the flanges off the slide out. You want to adjust so the piston bottoms out at the point the gaskets are fully seated on the slide out. Do this for both directions and you will probably have a bit of slack at the end of the ram where the adjustments are made. If this is not clear, have someone run the room in and out while you watch the adjustment end of the ram. It will become clear then. Good luck and keep us posted.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7