Quoted from cheezywhiz:
I had a flipper that had too much wiggle which made dead passes impossible. Ball would hit the flipper and just roll off and drain. I replaced the bushing which fixed the problem, but the flippers are still not as solid as newer games when dead passing. Normal for old flippers, or fixable?
Is the linkage tight?
If the linkage is free of slop and the coil sleeves are new, then that is as good as the stock mechs are going to get (assuming no prior op has subbed in other incorrect parts).
You can, of course, put in WPC flipper mechs and Williams flipper bats (longer metal shafts), if you want "surgical" flippers installed in your game.
Not only does this give you the ultimate flippers, but parts and rebuilds are 1/3-1/2 the price of the Classic Stern ones.