We just had our Rogue SL AWD diagnosed for "gurgling" noises evaluated by the dealer that sold us the car. They advised verbally that at low speed (when the noise is heard most prominently) they believe the CVT oil lines are either vibrating or a CVT pump is working overtime at lower speeds. They say it is not causing damage to the CVT but that Nissan is replacing it if the owner wants it replaced. But the fundamental concern is if the new CVT will operate any differently. I've email Nissan of America from their website with my concern and I'm awaiting their response. I'll update the site with any formative comments from Nissan.