98 blazer trans locked up and died in 5 mins. help

[blazerman47]

I own a 98 4x4 blazer w/ 160k. Trans was working fine, no issues and the stopped at light. The trans made a shutter noise when acellerating and locked up when I made a turn. It would start in 1st, 2nd and 3rd, but would locked up at 1500rpm. Oil was dirty, but not burn. Added a qtr of atf fluid. Tried to drive home at 20 mph you could could hear a loud sucking sound. Prehapes the pump? Then it stopped and would no longer go. Need help.