Just my 2-cents.
8-hours to R&R ouch!!!! My labor was 3-4 to drop the back end of the transmission to gain access to the secondary pump, and I have some corrosion from New Orleans on the nuts and bolts which added .5 hrs or so. I also discussed the stop leak and because of the tight tolerances and such was strongly advised to stay away from dumping goop in the transmission.
2000 E55 AMG
1970 280 SEL (for sell cheap)
1959 Alfa Romeo Giulietta Spider Veloce