I am rebuilding a 410 gear set I removed from a 1970 C-20 and I have a tight pinion after the yoke and retainer was installed. This request for help is, I laid the parts on the work bench in the order I removed them. Cleaned everything and began to reassemble. I installed the rear bearing and the thin washer down in the 3rd member. I did not assemble the yoke and retainer to the pinion and tighten to 160 lbs as per the service manual. Instead, I installed the first of two front bearings and then the race. Next came the spacer and the remaining bearing. Then, I installed the seal in the retainer with the remaining spacer and torqued to spec the retainer. Once that was done I checked the rotation of the pinion by hand. I could not turn the pinion by hand, it felt snug. It was not snug before the retainer was installed. So I put the pinion nut on and spun the pinion with a drill. It did fell a bit looser and I could spin the pinion by hand afterwards. I believe the seal had a hold on the pinion shaft, via the last spacer. Now is were the problem begins. I installed the yoke and tighten the pinion nut, just too 100 lbs. That locked up the pinion. Will not turn any more by hand. Help. I attached the service manual I used to rebuild the rear.
