> Does anyone have any experience with changing the seal
> between the automatic transmission and the final drive?
> Or can lead me to this info? How hard of a job is it?
>

How difficult the job is depends largely on what you're willing to do to
expose the seal. I had no trouble at all doing it, but I had the engine,
final drive, and AT unit all out of the van already. Doing it in place by
just removing the AT unit might be possible, but it sounds like a nightmare
to me, particularly if you don't have a lift.  I'd personally just follow
the Bentley and drop the final drive and AT unit as a whole, then drag them
out into the daylight. From there splitting them and installing new seals is
nothing. Be aware that the final drive section is made of cast iron and is
horrifyingly heavy. It's just light enough to move around by hand, while
still being heavy enough to hurt you.

--
John Bange