r and r = remove and replace the tranny is about 5-10 hours depending on the shop and model. You have to do that to get to them.
On the seal sweller, there is ample discussion on the pro's and cons of it. I let you make the choice. Either way it only delays the replacement date.
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)