The ft diff has a std cover but the rear is 3rd member style. Both in your 87 have drain and fill plugs. I did remove the ft cover at one point to extend the cap vent on the top of the ft cover (for water crossings). I used ultra grey silicone sealant to reseal the cover. There was no gasket there when I started either. <img src="/forums/images/graemlins/pfft.gif" alt="" /> <img src="/forums/images/graemlins/wink.gif" alt="" />