Red Dawg Racing's Terrapin Restoration Sept 17, 2012 21:25:51 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by reddawg on Sept 17, 2012 21:25:51 GMT -5 What is not visible in the photos is the small hole that was drilled a tapped for a 10mm plug. this will serve as a filling port for the differential lubricant.