G Voyager Differential Cover

Hi,
Has anyone resealed the differential cover of a 97 G Voyager with 3.3L? Mine is leaking badly. I dropped the pan recently and the pan side is now clean and dry but cover of the thing behind the pan (I think it is a differential cover), it is always wet.
If someone has done it before, I want to know what it takes to reseal it. Do I have to remove the cradle plate? Can it (the cradle plate and differential cover) be removed alone? I mean, no other things to take out before it can be removed?
Thanks

I still haven't done my homework. Anyway, this morning I had a chance to trace the leak. It looks like it is leaking in two areas : return hose and the differential-half shaft joint. It looks like the oil is coming out from one of the bolts. See http://www.geocities.com/egcentino/cars/GrandVoy97/TransOilLeak.JPG. It is the bolt that is encircled with blue.

Is there a seal there that might have broken? Just want to get an idea before I open it tomorrow.

Thanks for your reply.