 My Titan has a terrible, maybe defective transmission, something reported by thousands of owners on Titantalk.com.  At 18 months and with only 20,000 miles the truck is down, locked up on the dealership lot, waiting for parts that are backordered and never seem to arrive.  They say the engine light code shows a bad control valve assembly and transmission control module.  But the truck has been hesitating and lurching and fluttering on acceleration since it had a thousand miles on it, and the dealership said they were aware of the problem but didn't know how to fix it.  Now the truck has broken down on the side of the road, we limped it into the local dealership, and Nissan North America still doesn't know when parts can be delivered to the dealership.  Its a nightmare.  I'm in a crappy rental even though I have a bumper to bumper warranty for 100,000 miles or 5 years.  But basically I don't have a truck anymore.  Buyer beware.  I'll never buy another Nissan truck.