its a 01 auto and just recently it started to do funny things. when you put it in reverse its normal but when you go into drive it jumps hard now. After that from first to second it slams hard. Then from second to third it over revs like its slipping then jumps into gear. Does anyone know what it is or have had this problem and fixed it. my best bet would be the torque converter but i have no clue how to work on a slushbox. Any help would be great.