5mt holds 3.8 qt's
rear diff holds .8 qt
Extra-S is great stuff
BAC 5.2 recommends 3qt Redline light weight shockproof and Mutol 300 for the tranny and Mutol 300 for the rear diff
Both my cars have Amsoil Severgear in the tranny, the Spec has it in the rear diff, the wagon has Extra-S in the rear diff.
Like it was said above, you need to jack up the rear to drain the tranny of all the fluid.
I learned that the hard way.
174,000+ miles, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. Also CHECK YOUR OIL, these cars use it.