I have no idea about its service history, but I do know that it is not the original rear-end for my truck. The guy I bought it from installed a new pinion seal due to a leak, but he didn't drive the truck, he just bought it to resell it himself. BTW the pinion still leaked after his seal replacement. Bill I am guessing you are right about the rear-end running low on lube with these leaks present.
Jim
