so watch the oil mess from a damaged seal...
my Buick is originally from California, so a no-rust car , but a little ride on our fuc--- salty road can make some damages. Fortunatly only surface rust.
i had to make some cleaning, i used brake cleaner to remove all the oil:
the new parts are ready to be fitted,
the rear arms are ready to be bolted to the rear axle, i used some rust paint to have a nice working place...
