Moggo: Thanks for your contribution, much appreciated.
After much discussion the case for additives was dismissed...and the wrinkles remain!
My handbook does not mention the Morris oil you quoted, indeed the recommendation of gear oil specification in my Morgan handbook appears to have been overtaken by time and replaced with another Ford alternative spec - and that, at my request, is what has just been put in the gearbox by the dealer. Even comparing detailed specification from the technical details sheet, as a layman I am unable to tell if the Morris oil is better or worse than what is now in there (or why it would be better or worse). I need to learn more about this subject.
Your point about a magnetic drain plug is well made, at present I have no idea if one is available for my gearbox but if it is then I would think that it would be worth installing. Right now all I want to do is stop the oil leak....and get back on the road!
The 5 litres of gear oil issue has been pointed out to the dealer, but as it was supplied and billed to the previous owner I will leave it with the dealer to do 'the right thing' and reimburse him for the oversight.
At present I am unable to say if the new oil has made a lot of difference to the drive train noise as I have not driven the car much because of the oil leak. I will monitor the situation once the car is back on the road and let the forum know the outcome.
