That was the other guy; I wouldn't think about doing this with trans in car. I suppose a wedge in the 5th gears might work (the only ones exposed). The FSM only shows how to do it once the shafts are removed from the case. They essentially used shaped aliminum blocks clamped on one of the intermediate gears (in a vice) to prevent shaft rotation. Maybe an aluminum wedge between 5th gears? I suppose splitting the case and putting the same stuff back in wouldn't require re-shimming... Anyone know of a good Subaru transmission shop in eastern CT?