2007 dodge charger sxt 3.5 v6 has only 4 gears when in autostick Google says its a 5 speeds only one with 4 speed is the 2.7 v6?

Why does my 2007 dodge charger sxt 3.5 v6 has only 4 gears when in auto stick/manual mode if its suppose to be a 5 speed Google says only one with a 4 speed are the 2.7 v6 se is only in manual mode this happens can someone please explain??
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