HEY Amsoil Specialist MAN - Dilemma

[andaconda]

Here is my problem - self inflicted.

My wife has a 2005 Subaru Baja with a non turbo auto transmission.
I changed out the front differential to
75W-90 Synthetic Long Life Gear Lube (FGRQT)
and I changed the rear differential to
75W-90 Synthetic Long Life Gear Lube (FGRQT).

Here's where I went wrong:
Front capacity is 1.3 quarts
Rear is .8 quarts.
I under filled the rear by .2 quarts and over filled the front by .2 quarts.

Now I can open the front drain plug momentarily and hope it to get it to the right level, but with the rear I am stuck.

It took 6 weeks to get the 75W-90 Synthetic Long Life Gear Lube, and my wife needs the car Monday morning.

I have gotten a hold of .75 quarts (.05 quarts shy of fill up) of
SEVERE GEAR 75W-90 Synthetic EP Lubricant (SVGQT).

HERE'S the question.
Should I drain the rear and re-fill it with what I have and leave it .05 qt under filled, Or should I just top it off with the SEVERE GEAR lube?

Anxiously awaiting your reply!
Thanks