Here are Nissan Frontier transmission problems, by model year. The most common Frontier transmission problems cost $3,800 to fix & occur at 110,000 miles. Regarding the worst model year 2005 Nissan Frontier transmission problems, "In a very limited selection on small pickup trucks, the Frontier is one of the best options except -- and I cannot emphasize this enough -- for one problem that makes it an avoid-at-all-costs pain in you know what: the radiator ruptures and leaks coolant into the transmission, killing it. Such a buzzkill." Click on a year below.

Worst Transmission Problems
radiator causes transmission failure 2005 Nissan Frontier
radiator crack leaked fluid into transmission 2006 Nissan Frontier
coolant leaked into and ruined transmission 2007 Nissan Frontier