I had these casting imperfections for sure. I have seen these before so I was not too worried. I just did the air pressure check as requested from Mike L. NO leaks so all is well. You better do air checks if your concerned.
If you have the same crack looking lines in the seal area, I'd say they are cracks for sure. Wow, those clutches were certainly slipping I would think.
Kurt that first video was worth the wait. I sure hope you get your truck gets ironed out so as you can pull both tires. :) Heck you may have to steer with the rear brakes. Good job Kurt.