Replacing the transmission pan is not exactly simple, but it certainly is doable.
There is a round rubber gasket between the plastic transmission pan the the metal of the transmission body. I would say you can tighten up the Torx bolts but just to spec - that should not hurt anything.
The link has some jpg's that show the bolts bit. Note Ford versions tend to use a metal pan, shorter screws and a normal flat gasket. The LR3 is not normal.
The link below is to a number of files I have related to our ZF 6HP26X transmission and the pan change.
http://www.**************/gallery/thumbnails.php?album=5059
Replace the **** with disco3 co uk and insert a period in each of the two spaces.
awesome, thanks very much. heading to the dealer first thing in the morning for some parts. I need new drain and fill plugs as well due to crush washers, correct?