The only new timers I can recall in Manhattan are on the SB / local south of 86th street, just south of 34th street on the SB / local. and just north of Canal Street on the S/B express track. I'm honestly surprised the SB express stretch from 59th - 14th Street didn't get touched during that period. The other infamous slow spots (135th St, 34th St N/B, etc) have been around since forever. I believe the timers added on the CPW express section were installed around the mid - late 1980's from what I remember reading somewhere, someone can correct me if I'm wrong.
In Brooklyn, going Manhattan bound is still sort of the same aside from the timers added at Broadway Junction and around Jay Street. This is going by what I remember from about 1993 and on.