trans slips in 2nd gear.
Your Murano should have a CVT automatic since that was standard. That means you don’t have a “second gear.” Nissan CVTs have a history of problems. Take it to a good independent transmission shop.
Nope, 2007 was a standard automatic transmission
From Cars.com:
https://www.cars.com/research/nissan-murano-2007/ I took their word for it.