Oil around rear diff input seal

[ElectroDan]

I've just got my 2004 4.8iS back from having an Inspection II service (the last one was done 58k ago!). My car is on 108k miles.


They noted that there was a dampness of oil around the rear diff input seal.


Is this a job I should get done asap? I have noticed a deep rubbing noise occasionally when on the throttle, so I'm wondering if the diff oil is low and causing it.


Am I right in thinking there are 3 seals on the rear diff, and that it's best practice to get all 3 replaced at the same time? I don't know how long the job takes, but I read the seals are pretty cheap?



If anyone has done this job themselves I'd be keen to hear how long it took, or alternatively if a garage did it, how many hours they charged for and the overall cost.