I think it is the standard 3yr/36K miles like most of the truck. It is only the engine and accy that is covered by the 10yr/100K miles IIRC. The warranty book should list what the transmission warranty duration is.
The transmission itself is 3/36, but all of the solenoids and switches including the prndl switch are covered by the emission warranty. The length of the warranty is determined by the year and model of the truck. for example, the warranty on the 8.1 gas motor is different than the d/max. If you are having a problem with your dealer, ask them to check this out for you.
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