Cheers jo3 and planc, I had a look and lo and behold, I stupidly was looking at the wrong engine and was trying to un do the wrong nut!!! Was about to do it this afternoon and the heavens opened up
Got myself some correct oil now so I'll get on it after work tomorrow and see how she runs.
The garage is adamant its a faulty clutch I brought. They have even ordered me a new one!
Cheers again lads, relly is a big help.
Dmc, the code for the gear box oil is - Api gl-4 or gl-5. Sae75w-90. Halfords and b&q sell the stuff but people on here may well know better oils out there