What are you using for 8 3/4 pinion seal?

65TerrorCuda said

They can leak through the pinion spline and out the nut too according to what I heard. I siliconed the splines on mine and no leaks there

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I used Permatex High Temp Sealant wiped it on the insides of the pinion splines of the yoke before I slipped it on. I think that was part of the instructions in the Factory Service Manual.