I killed my first trans pump

Does it need more than a pump, converter and vb?
Pulled the VB apart, and no apparent damage, cleaned it up...all seems well.
Was pretty excited to put the Trans go kit to the test...would be my first time using one.
When I was younger, TCi and B&M still made decent transmissions. I hear that's not really the case these days.
Any advice on a converter??
I'll have to go new anyhow, old TC is 19 spline.