Sun Aug 20, 2017 7:34 am by cornbinder89
When punching holes, I find a ball bearing, 1/4 to 1/3rd bigger than the hole in question does the trick. This is if the cover or piece has good sharp edges to the bolt holes. Lay the gasket over the item, place the ball bearing over the hole and strike with a hammer.
I assume the need for the gasket is for period look. Today no heavy diff Mfg even sells or lists a part number for a cover gasket on heavy diffs. The only list RTV
I have been able to get gaskets for more common lighter diffs, but anything bigger is always RTV.