three speeds torque tube are pretty easy by your self, id lower it on a jack n slide it out on cardboard, then to put it in, crank your floor jack up almost level with the floor pan, come through passenger door, set it on sideways a lil bit, have someone lower it till you can get it on your guide bolts. ( dont forget the headless guide bolts!), i did a 3 speed this way by my self and the 4 speed this way with a helper.
note, the 55 up 3 speeds ( sm318 and sm319s) are longer and i found it easier to drag it underneath, place a jack next to it, come in from the passenger door, and lift it onto the jack through your floor board, then have someone jack while you guide it.
