[Jim Brierley]

No, I am too lazy. I drilled carefully to the point of going thru, then put grease on the drill to capture any chips. Diff oil usually does not venture out that far in the housing. In diffs that have been used for many years there is usually some grease in the housing, caused by over-zealous greasing of the wheel bearings and a faulty outer seal, many guys install that seal backwards, the lip should face outwards to direct the grease into the bearing, it is not there to keep oil in the diff.