Here are the horses who won the first two Triple Cropwn races but failed to win the Belmont.
Year Horse Belmont finish 1932 Burgoo King (Did not start) 1936 Bold Venture (Did not start) 1944 Pensive 2nd (Bounding Home) 1958 Tim Tam 2nd (Cavan) 1961 Carry Back 7th (Sherluck) 1964 Northern Dancer 3rd (Quadrangle) 1966 Kauai King 4th (Amberoid) 1968 **Forward Pass 2nd (Stage Door Johnny) 1969 Majestic Prince 2nd (Arts and Letters) 1971 Canonero II 4th (Pass Catcher) 1979 Spectacular Bid 3rd (Coastal) 1981 Pleasant Colony 3rd (Summing) 1987 Alysheba 4th (Bet Twice) 1989 Sunday Silence 2nd (Easy Goer) 1997 Silver Charm 2nd (Touch Gold) 1998 Real Quiet 2nd (Victory Gallop) 1999 Charismatic 3rd (Lemon Drop Kid) 2002 War Emblem 8th (Sarava) 2003 Funny Cide 3rd (Empire Maker) 2004 Smarty Jones 2nd (Birdstone) 2008 Big Brown DNF (Da'Tara) 2012 I'll Have Another (Did not start) Source: About.com
