Tranmition Oil Change

[dmc12@xxxx]

How do you change the transmition oil and how often should it be 
done? I realise there are 2 sump plugs under the transmition unit 
(Automatic) but I assume one of these is the automatic transmition 
fluid and one is the transmition oil, but which is wich, I don't want 
to drain the wrong one.
What oil do you put in the transmition and where do you fill it from ?
Also is it advisable to change the transmition fluid? I have been 
told that auto transmition fluid is only really changed if the 
automatic transmition is regularly being put under allot of strain 
ie. when towing a big trailer.

Any advice would be appreciated.

Regards

James RG


P.S. I am going to be upgrading my site to a video site which I will 
place downloadable videos of me doing work on my Delorean, would 
people be interested in being able to download short 2-3 minute clips 
of say fixing the fuel sender unit, and more basic items such as oil 
changes? 
Pictures are usefull but if I put videos on the site would this be of 
interest to anyone. I often get pics sent to me when I ask a question 
on the list but surley a video arcive would be the ultimate senario.
are people prepared to download 10MB files I will do all of the 
projects as individual files so you can download the specific job you 
are going to do. I would also ask others if they are willing to send 
digitised video files to add to the site. this is just theoretical at 
the moment but I hope to have at lease one video on the site by the 
end of the month.

Opinions appreciated.