Lee:

My Bentley manual indicates the capacity to be 3 Liters (3.2
quarts). However, my understanding is that draining the
transaxle completely of fluid  is not possible with simply
opening the drain plug.  The Redline synthetic gear oil is
compatible with "dino" gear oil (so says the packaging), so
a full and complete drain down doesn't seem to be
imperative.

Maybe others have better info,

- - George Chapman, 91 GL
    Lake Almanor, CA