Thanks Ross...
Seems you were bang on the money.
I had already done the exact marking you said lol, (just read your post now... haha), and then, using some ahhh... VERY creative engineering, housemate and I managed to undo the retainer. (Truth be told, they need'nt be super tight anyway, and took exactly 8 turns from the marks, till it lifted out). And yeah, then you just bang in the "E" shaped holding clip, narrow side up, and should be good!
Ok team... little bit of education for the un-educated...
If you currently have no idea wtf Ross and I were on about... heres some pics:
Looking from the wheel arch into the diff:
Closer inspection with retainer removed:
The OLD seal and the root cause problem:
Old and new, with the problem in-between:
The side of the retainer you can see:
And its other side:
So new seal is ready to be dropped into the retainer, Ill be back at Ozzy Park at opening time tomorrow for an o-ring, and then its full steam ahead for re-assembly. Special tool NOT required...
and some time, photos, and learning along the way, got me through.
Bolt it all back up, drop in a new container of smurf blood... and we should be all good by lunchtime 2moro!
Hooray for D.I.Y... haha.
Brent.