A friend called. He has a Grand Marquis, I believe it's a 2006 with ABS. Said a caliper pin shattered on him Saturday while hand-tightening it. Got replacements (for $100!) and they gave him two different-sized pins and boots. We can't find any information on which pin goes where, i.e. whether the thinner pin is on top or bottom. Five dealer mechanics gave five different answers (to an A/B question, go figger), and my EBSCO on-line source gives no clues.
So does the big pin go on top or on the bottom?