Rear Main Seals ?
easy it a relative question, I personaly dont think so but others may disagree. You will have to drop the pan and the oil pump and rear main cap and then try and roll the bottom half of the main seal out from under the crank and then roll the new one in to replace it. This is a serious pain in the butt and may not fix the problem anyway, easiest is hate to say it drop the engine and pull the crank thats the easiest way and it lets you check your bearings of course if you go that far may a well do a rebuild.HMMM no easy way that I can see. :(