**Gasket or just RTV is the Question**

9 inch Fords are notorious for leaking past the 10 pumkin studs, no matter if you use silicone or a gasket. They came stock with copper washers under the nuts. Use a gasket and use the copper washers, you'll be set. You can get the copper washers from Ford, but for reasons I don't even understand, they come 32 to a package and they ain't cheap.

If you use silicone and too much of it, it breaks off inside and goes straight to the pinion bearings in the pinion retainer. If seen hundreds like that.

Russ.