I am going through the same thing with the '88 I just bought. I'd love to know how long the dumbass drove it with about .5 quart of lube in the case. <img border="0" title="" alt="[Mad]" src="images/icons/mad.gif" />

Anyway, you only have to pull the driveshaft, then the output flange on the case. On mine it is a 30mm nut, the only socket I could find was $17. <img border="0" title="" alt="[Eek!]" src="images/icons/shocked.gif" /> I noticed there is a very small seal inside or the flange itself, I guess to keep dirt from getting to the main seal.