Rear Main Seals ?

I have done this several times. It's a relatively simple procedure. The hardest part is probably getting the oil pan back on with all the gaskets straight & in place.

Remove the center link, oil pan and rear maincap/oilpump. There is a special tool available called a "sneaky pete" that will help you remove the seal & install the new one. It's kind of like a fishtape that electrician's use. Follow the instructions on the seal & you should not have too many problems. Reassemble everything, torquing it all to spec. and you will be set.

One last thing: The two-part neoprene seals are way easier to install, but IMO, they give you about a 50/50 chance on whether they will leak or not. Stick with a good old-fashioned rope seal - your autoparts store might have to order one in for you, but they are a far better bet.