My truck naturally had a bad transmission seal. This was on a 2006 Dodge 1500 4x4. It wasn't difficult, the hardest part of the whole job was that I didn't have a lift, so I was on my side or on my back the whole time. Once you've pulled the gasket out, installing a new gasket is fairly easy. When you remove the gear nut holding the yolk. Notice how far this nut is pushed in. I took pictures for myself. I made it as close as possible to what was in the picture. I also did the diff cover gasketโฆ