Mine does that every once in a while. Mine strips the teeth on the pinion gear. Each slide guide has a rack with pinion gears fastened together by a piece of square tubing. They keep both ends of the slide in alignment with each other. There not hooked to any power, just keep the ends tied together.
I just replaced mine Saturday. Takes me about an hour now that I know how. I just ordered 2 new 16 tooth gears for a tad over $50 with the shipping. I like to keep spares. Mine is always on the street side. Guess I'm going to have to check into whats dragging and causing the problem.
The first time I had to use a screwdriver and lever it against the frame into the rack. I walked the end away from the ram in one tooth at a time. One tooth equals a quarter inch on mine. Lever it and run the ram in a little bit and repeat, over and over. I got it home that way.
2012 Chevy 3500HD Dually 4X4
Crew Cab long bed 6.0 gasser 4.10
2019 Open Range OF337RLS
Yamaha EF3000iSE
retired gadgetman