The rod can be adjusted down at the tranny's lever. Move it outwards (Out of the block it is held in, towards the front of the car) for more throw rearwards movement. This will increase pressure slightly inside the trans. delating shift points.
Inside, theres a screw that adjusts line pressure. You'll need to take the trans pan down for that one and do not really recomend that move unless the rod adjustment doesn't help.