Right apologies for lack of photos but it should be easy to follow the steps regardless.. Could this be pinned?
you will need:
3.1 litres of gearbox oil : G 060726A2 (Approx £4 per litre)
Seal: No 085301227 (Approx £4)
Bush: No 001301209 (Aprrox £4)
A length of pipe about 100mm in length and and wide enough to go over the selector rod
Chisel or something similar
Mole grips
step 1.
undo oil drain on the diff just below passenger side driveshaft and remove oil
step 2.
Using a pair of grips/pliers/mole grips get someone to lightly pull at the bush while you tap the back of the bush with a chisel until it comes free. Leaving the seal in tact ensures it does not scratch the rod and they will both come off together.
Here is an image of the bush and seal removed
step 3.
Carefully push the new bush down the selector rod and using your bit of pipe carfully tap it into place.
step 4.
Slide new seal paying particular attention to the part numbers on the rubber seal pointing outwards so they can be seen at all times even when in situ. Use some grease to lubricate the selector rod when doing so and use the metal pipe again and gently tap into position.
Step 5.
From above using a suitable funnel and pipe inserted into the top filling hole about 60mm above the drain hole fill the box with 3.1 litres of oil. Replace the drain plug and give everything a quick check over and a wipe.
So far it seems its stopped my leak and it also seems to have smoothened the selection of second gear. I think there was some play on the rod moving between the bush before hand which occasionally would interfere with a smooth selection of 2nd.
Note: i also used a tiny bit of sealer on the back of the lip of the bush which contacts with the box and used a bit of fine paper to carefully remove a few light scratches on the rod. nothing major, will be fine without these things being done, personal choice.