just bought the truck 96 xe 4x4 5speed. this is my second nissan. what is the deal, the truck turns 3000 rpm @ 60mph in fifth gear? i bought the truck to save gas, and at this rate I would be better driving my 2500hd. it has a 4.8 rear axle. what gears did this truck originally come with? can i change to a lower gear? i do alot of highway miles and do not want to turn the engine that high as i cant imagine it to be good. any thoughts?