The first thing to do is put the gear box on a nice clean bench with plenty of room so you can lay things out in order, then it is best to remove the reverse light cable from the outside of the gearbox.
The bell housing can then be removed by undoing the 17 mm nuts inside it. Once these have been removed, a sharp tap will unstick the bell housing from the body of the gearbox.
Next we turn our attention to the rear of the box and we remove the drive flange nut and then pull the flange off, the gear lever stub now needs to be removed.This is done by undoing the two breathers either side of it and then prizing the domed cover off. Under this you find a plate with the device that stops you going from 5th into reverse this also has to be removed.
You are now free to undo the rear case of the gear box, this will also need a sharp tap to unstick it.
Once this is removed you expose 5th and reverse gear 5th being the gear furthest to the back.
Now we have to separate the two remaining halves of the gear box, before we do this we need to remove the 5th /reverse selector fork as it stops the two halves separating, this is done by removing the 11 mm bolt that secures it and pulling the shaft backwards. The two halves of the box can now be split and the shafts simply pull out,
…next you have to strip the shafts down!