[Darklen]

The pins are splined or knurled on one side and mostly come out from right to left (viewing from the back). If you punch them out the wrong way, it's a royal pain as the splined end is bigger than the holes in the body and gearbox shell you're trying to push it through. Once it's out, reinstall it the same way it came out (usually from left to right) with the splines being the last part going in.