[urq] gearbox leak

[Keith]

Because I have spent an inordinate amount of time changing the cylinder head gasket on my WR, it has stood inactive for longer than it ever has before and now I have signs of an oil leak from the tail end of the gearbox. Can anyone supply me with a good exploded diagram of the tail end and also a part number or dimensions/type details of the oil seal that I presume should be preventing the egress of the oil? Of course it would be rather nice if the leak stopped as soon as I start using it properly again – which is soon because I finally got it all back together today (hooray!).
As always, any advice/assistance will be greatly appreciated.
Regards
Keith

‘87 WR (rumbling beautifully again in bright sunny Worcestershire)