Transmission removal

[Pommie]

Engine out
turn it over and remove the lower cases, not a huge job but read the manual about it first
If your gears have only just started jumping out you may just get them back cut replace the shift forks,check the shift shafts for straight , and be right to go.

Not sure about your "felt like rear tire was on ice" thats not a normal symptom for a gearbox prob unless something exited southward ??? i'd check it further before just pulling the engine..

When it clunked just felt like the rear end slipped, lost grip and had a bit of a wobble. Could it of been the tyre lighting up? I was getting right up it. I have washed it all this morning and lubed the chain, might of been a bit of oily water thrown out under the tyre, I'll give it some beans again on my next day off and see what happens before I get all carried away