T-350 transmision
 

i have a chevy th350 that has just been rebuilt and the vehicle will not move either way without raising the rpms. once you get it going it shift fine or maybe a little quick. you don't feel anything when the vehicle is put in gear. plenty of fluid according to the stick. how to check my torque converter. please help!!!!!

What's the 'condition' of the fluid? Brown? Burnt?

Torque converters have a sprag that can fail. Hard to daignose from here..