4l80e whine, could use some help

[Shortie]

Hey everyone. I have a 4l80e behind my 6.0l. Last winter trans was rebuilt, transgo hd2 kit, and a revmax 3300 stage 3 stall installed. Currently has a little over 1000km on it.

The other day I was leaving a local show and started hearing a whining noise that happens in all gears (sounds like power steering or a supercharger whine). Got it home and when backing in also noted that it took a good 5-6 seconds to go into reverse after shifting.

Assuming that I have either burnt up the converter already, or that the pump is shot.

Just wondered everyone's thoughts before tranny comes back out and gets a full re & re
Also anyone know if I can test and monitor line pressure using hptuners?

Thanks