727 Installed - No Movement in Gears

If your trans had an oil light like a motor, it would be ON. Nothing is being lubed; no bushings and no thrust washers, it's frying everything. The pump is sucking air.

Thank you. Per my previous post, I have already confirmed that no fluid is being pumped = nothing is being lubed. I shut it off right after the test, hopefully nothing is damaged yet. My question is, is this most likely a larger problem, or simply low on fluid? SHOULD it still be pumping fluid with only 7 quarts in it? As previously mentioned, I have a deep +2 qt pan, and I also have a filter extender. I do not want to OVER fill the trans and cause damage that way.