As an update, I think that TC remanufacturing is not using updated torque converter pump drive splines. Even though they said so in their email, I received two torque converters from rockauto (3 tab and 4 tab) ( F68E and F68E-2 ) since I did not know which one I would need, and they both seem to have regular torque converters splines. Does not look like sonnax part FD-WS-31, but cannot be sure yet, will figure out a way to measure. I will be looking into this further, but aside from the splines, it seems there is some dirt in the torque converters. The plastic cover that is supposed to cover the torque converter hub was not on either of the torque converters. I think this is no good, being that these are pretty expensive, 150 +100 core charge. I was under the impression that TC remanufacturing was previously Dacco, but that seems to not be the case. I am thinking I will return these two.I think most TC re-manufacturers will use the upgraded pump drive washer, probably sonnax part FD-WS-31. though it is still best to check with the remanufacturer.
I am looking into other remanufacturers. I am thinking to try Transtar (Recon ?) or Precision Of New Hampton.