96 9000 CSE turbo-4

Need some help with an issue with our 96 9000 CSE. The car has started to
make a grinding or growling type noise primarily when coming to a stop.
Thought at first it was the brakes, cause it is like a brake scrub when the
car is almost stopped or straining at a stop, but this is a little louder,
and now seems to be happening even when car is totally stopped. Also hear
it faintly when car is going down street at times. I think I've eliminated
brakes and A/C and any CV joints or bearings, since it seems to continue to
make the noise even with car stopped. This was not true at first, but it is
now, which is what has be so baffled. I do not know if it is a Automatic
trans pump or the trans it self or something with the ABS system/pump or
some other vacum/pump type item. Any and all help is appreciated, as I can
only cringe at what the Saab dealer will be charging and if what they say is
wrong is really what the problem truely is. The car continues to run and
drive on the local on highway roads just fine, shifts and down shifts fine
and doesn't slip, so not sure if transmission issue or not. Sound and
vibrations seem to be right in front of me driving, and NOT on passenger
side, which is why I'm thinking transmission, but fluid is good and no other
symptoms.......Any and all help is appreciated....Thanks.