Is the Wrangler W5A580 gearbox service free?

Just a quick question around. I've seen on the four-wheeler magazine that the Wrangler gearbox in the newer Pentastar versions is a semi-sealed unit. It has a dip stick still, but unless the Jeep is commercially used, the gearbox is supposed to be virtually free of having to do any services (as in oil changes). As my car Jeep is coming closer to the magic 100,000 km mark I am wondering if I should include the gearbox oil in the next service cycle or get the transmission oil changed. Anyone here knows more?