I run a drop of blue loctite on each bolt. Before doing that be sure all the bolts thread because the flexplate will only align to the TC bolt holes one way. When I had my engine out I put the flexplate onto the TC and found how things aligned, then I marked the TC and flexplate with a little spray paint so it would be easier to assemble when they were together. Also, thread the bolts finger tight but don't tighten them until all are in. Sometimes you have to move the flexplate just a little one way or another to get everything to align. After they align, pull one bolt out and put your loctite on it and rethread and tighten... then do the rest like that.