Are you soaking your seals before you put them in? If not, soak the seak in trans fluid for atleast 1/2 hour before you install it in the pump.....3 or 4 hours is better.
If you have pre-soaked them.....make sure you have the correct seal, look for any burrs or marks on the converter snout, support bearing in good order....and use alittle vasaline on the converter snout and seal before fitting the converter.
If you have pre-soaked them.....make sure you have the correct seal, look for any burrs or marks on the converter snout, support bearing in good order....and use alittle vasaline on the converter snout and seal before fitting the converter.