Please help if you've ever changed a pinion seal in a BOP. After removing the drive shaft, I marked the pinion nut, shaft, yoke and housing. Then counted the exposed threads on the pinion shaft sticking out past the nut. I then removed the pinion yoke nut and washer. I thought the yoke was supposed to slide right off, but no way. So I tapped it from the back side, thinking it was just seated tight and needed a jolt. Nope, no movement at all. So i put a puller on it, and started to wrench on it. Still no go. I have so much pressure on it now that I'm afraid i'm going to snap the puller or break the yoke. Is this supposed to be this tight? Is there a trick, or am I missing something? It's a 1967 GTO with the 8.2 3.36 housing. Anyone else fought this battle and won?