Got the leaking left rear axle seal replaced, popped-in a new left rear axle shaft bearing, a new C-clip, and got all new Amsoil 75-w140 axle fluid installed, along with Ford Racing friction modifier.
Then finally DROVE it like I've wanted to for the past week that it's been sitting waiting for the repair.
Autonation Ford (formerly Tousley) was nice enough to send me an axle seal for a 7.5" axle, way too small for the 8.8 in my car.
Thank God that the shop had a proper seal available otherwise I might've been up a creek looking for a paddle