Originally Posted by 64pmw
May have worsened. First time to check since arriving home yesterday and now won’t open for the first time!
Have had same trouble. Almost guarantee it is gearbox. The gearbox is notorious for failure, the teeth in the gearbox strip and you now likely have more than one stripped tooth, possibly two side by side as you are finding your slide is getting worse. Replaced my bedroom gearbox and the new ones are upgraded and supposedly stronger. I purchased an extra one and pack it with me just in case dinette slide fails.
Isn't it fun getting at the mechanism to repair? As an afterthought, before taking motor and gearbox out check the electrical connections, I have heard where they can sometimes come loose. Seeing as how it wont go out now it could be motor.