yeah its pretty easy, u dont need to touch the gears, u just take all the bolts out, theres an allen key bolt on the side of the gearbox that has a spring and a ball in it that needs to b taking out, the box should come apart by a few inches then theres 2 12mm bolts holding a gear selector on inside the box (its a bit of a bastard to get to), take them out and then the box comes apart, swap the diffs over and put the box back together.