I am not aware of a Redline product number 57905. They do have a 57904 that matches your description. This is for use in limited slip differentials. The added friction modifiers in this oil do their job too well related to transmission gear synchros, it causes them to slip and not grab the gear when you shift gears. Also, most GL5 lubes have extreme pressure (EP) modifiers for the ring and pinion gears and should not be used in transmissions. These GL5 modifiers tend to corrode yellow metals (copper based brass synchros) present in transmissions, thus GL4 rated oils are typically used in transmissions. However, some oils that are made specifically for transaxles are rated GL5 for the ring and pinion, but also are safe for the yellow metals, due to the addition of copper corrosion protection additives. The Ford recommended oil is GL5 rated and rated for the transaxle. Redline has a product that is probably superior to the Ford product, is rated GL5 and is formulated for transaxles. It is product number 58304, Red Line 75W90NS GL-5 Gear Oil. It is rated for Porsche, Ferrari, Subaru transaxles. See tech sheet attached.
I dearly wanted to run this Red Line oil, but, the consequence of problems later is $$$$$$ and more $$$$$$. I stayed with the Ford Product.
PS: Just found the 57905. It is the same as 57904 (Qt), but in a gallon size. Don't use it!!!!!