Diff dastardly

THE Falcon XR6 ute I bought new in 2004 developed a diff noise just past 61,000km. It's only done 63,000km and has been used as a workhorse, but Ford has washed its hands of the matter because it is out of warranty. Mechanics have told me the diffs are a regular problem. If so, surely Ford should repair or replace it. I have also been told the wheel bearings will go next and to put in an auto transmission cooler because there is a problem with the cooling cores in the radiator bursting. The auto then fills up with coolant. Ford knows about all these problems, so why doesn't it tell people who have brought BA Falcons and maybe go 50/50 on the cost of rectifying them?