Starcraft 24 RLS schwintek slide noise
We have a 2016 Starcraft 24rls, it too has a popping sound when moving out.
It did this at the dealership and the tech said it was the rubber seal slapping the slide when it moving, BS. To me it sounds more like the gear is jumping the teeth on the rack. This noise is only on one side, nearly all the way out.
I really doubt lube is going to change this noise.
If your looking for the controller for the schwintek system on this RV it is under the TV stand near the heater.