727 Control Linkage Shaft Seal replacement

I've done it before but it is not easy, done mostly by feel. You can yank the old one any way you want, just make sure not to scratch the shaft. Then use an appropriately sized socket like signet mentions to tap the new one in. Depending on the body type, you'll have zero to little room to engage it with the side face of a hammer. Make sure to feel around the edges as you go to ensure it goes straight in. It is pretty easy to ruin the seal this way if you are not careful. I honestly find it easier to drop the pan and valve body after doing it this way a couple times and ruining more than one seal.