rebuild question
However, if the trans was rebuilt because of broken metal parts, then the converter should be sent out for an "open and clean" and the cooler must be replaced; also flush the lines.
Because a cooler has many parallel paths through it, flushing it may not get all the metal shavings out; by Murphy's law they won't come out until the new trans is installed and then damage that too.
The 3-4 clutch simply wears out, especially the stock 6-friction setup.
Rebuild the 3-4 clutch with 7 or 8 frictions:
https://ls1tech.com/forums/automatic...n-problem.html
I defer to Joecar's advice on the converter.









