Slide-outs are built on different mechanisms — rack-and-pinion, cable, hydraulic and others — and each has its own manual, adjustment points and common failure modes. Two rooms with the same symptom can need completely different work.
What you see and hear matters: a grind, one side lagging, a room that stops partway, or a seal that no longer closes. Leave the room where it is and describe it rather than forcing it, since forcing a jammed mechanism can turn a repair into a replacement.
