Leaking ATF

[Elli]

My Caravelle (see signature) has sprung an ATF leak from where the differential meets the engine.
I'm thinking it's an oil seal but I cannot for the life of me find a part number as I don't have Haynes or Bentley, or anything of that sort.
What part numbers should I be looking at?
Also, what would be wise to do at the same time? Is it a "Engine and transmission out" kind of job, or only transmission?

[silverbullet]

Sounds like the torque converter seal has failed.
It will probably be in ETKA otherwise off to thesamba.com and use the search.

[Elli]

From what I can see, it is most likely that it is the torque convert seal (003-519-089-D) that is leaking. Can anyone confirm that I have the right part number?
And while I'm at it, what else should I replace?
I have all the time in the world to fix it now, as I went and bought another T25 (1980 Aircooled JX Westfalia pop top) so I wouldn´t have to skip any travelling while the Caravelle is pissing ATF