I did very recently have an odd experience with a transmission filter for a Turbo 400 from AutoZone. After installation, I had issues with pump whine/cavitation when first starting the truck cold. Ran it for about a week and took it out and replaced it with a NAPA filter (the only trans filters I've used besides genuine GM). No evidence of defect, o-ring on pick-up pipe was fine, seal at filter body seemed normal and snug. Installed NAPA filter, has been fine since.
I returned the filter to AutoZone who gladly gave me my money back when I told them what happened and what cured it. They allowed me to keep the filter to cut it opened, the manager just wanted to know what I found when I opened it up, as they said they haven't had an issue with these filters (the box says made in Taiwan, minor mfg. differences from the NAPA filter). I cut the filter open, no evidence of debris, defect or obstuction what so ever. The media was a sheet of material, folded in half to fit the metal filter body
I've heard Turbo 400s are sensitive about filter flow, but I have no idea why this filter seemed to starve the pump cold.