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Model	Years	Speeds	Drive Train	Trans Model

Truck NPR	1987-98	4 Spd	RWD 3.9L Diesel	JR403E
Truck NPR , W4	1997-08	4 Spd	5.7L, 6.0L	4L80E
Truck NPR	1999-07	4 Spd	4.75L, 5.2L Diesel	AW450-43LE
Truck NPR	2008	6 Spd	5.2L Diesel	A465