It's in my non Saab gearbox, put in by the rebuilders. It works OK, no better, no worse.
I put some in my 9000 gearbox, and shortly afterwards the drive plate gave up the ghost, damaging the oil pump in the process, so I got that 'box fixed! Obviously the failure of the drive plate has nothing to do with a fluid additive. Saab's service bulletin was circulated because of a noise that was not an operational fault, but was annoying customers.