I'm like 99.999% certain your slide is electric driving cables (what Northwood usually uses on the small bedroom slide). If my brain is working, there is a covering under the slide that you will need to remove to do this
An adjustment is the fix, on Tuesday call the factory and have Rick tell you how to do it (probably e-mail you instructions).
Or take it in for service.
2008 F350SD V10 with an 2012 Arctic Fox 29-5E
When someone tells you to buy the same rig they own, listen, they might be right. When they tell you to buy a different rig then they own, really pay attention, they probably know something you don't.