One problem related to transmission not engage has been reported for the 2006 Nissan Frontier. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Nissan Frontier based on all problems reported for the 2006 Frontier.
When set in d, the rpm's dropped. Next day driving 20 sec. And looses all power. Can shift the gear stick, but the transmission does not engage. No audible warning or anything like that. Just stopped driving. Got code p1759 and p1769. Needs new transmission and radiator because the coolant leaked into transmission. $5500 is the quote from the dealer.