Nissan Frontier, Pathfinder & Xterra Coolant Leaks Causing Transmission Problems
The 2005-2010 Nissan Frontiers, Pathfinders and Xterras with five speed automatic transmissions may leak coolant into the transmission causing rough shifting. Last October, Nissan extended the warranty on these vehicles to 8 years or 80,000 miles. Nissan blames the problem on a cracked oil cooler tube.
In a NY Times story on its Wheels blog, an expert is quoted as saying, “This is a total failure of the cooler portion of the radiator that is responsible for the cooling of the transmission."
The federal safety agency has at least 200 complaints about transmissions on those vehicles and the Center for Auto Safety has almost 50.
The Center's director Clarence Ditlow states, “It is one of the bigger transmission problems that we see. It is costly and it can cause an immediate failure."
A letter from Nissan to owners notifying owners of the warranty extension talked about the coolant leak, but failed to mention that the leak may cause transmission problems. When challenged on this point, Nissan's spokesman said they did not want to "get too deep into details."