Hi there,
I certainly second the use of Valeo clutch etc. Valeo are original equipment for Land Rover and as such are a great choice for replacement parts.
Mine has just been done and l am very happy with it. Make sure you have it done by a Land Rover specialist. Defiantely worth having the various input and output seals done on the 5-speed and transfer also.
Would only do the rear main if it is leaking. Otherwise leave it be was the advice from my mechanic (Defender specialist).
Good luck,
Michael

