My daughter's 98 all wheel (or 4 wheel) drive RAV4 is due for service. It looks to me like any other automatic transmission fluid change, i.e. drop the pan, pull the filter (I assume there is one in there) out and add fluid through the dip stick tube. Has anyone done this on a RAV4 who could confirm it for me? I was all around town tonight and cannot find a Haynes manual for it. Last, it looks like the pan has a dran plug for a rather large allen wrench. Is it a drain plug? Anyone know the size? It's bigger than any allen wrench I have. Thanks.