2000 Saab 95 SE 3.0 V6 turbo. Sedan

I have multiple issues going on with car. The main question that I have, is: If car stalls, and won’t move, or even when it seems to be running ok, does this necessarily mean that I have tranny problems ? Some of the probable other issues that I think might be relevant. Cylinder head probably blown. Vacuum lines either hooked up wrong, or not at all. Significant coolant leaks, so not able to use a core tester.

Mechanic has it now, and I’m just concerned about being taken for a ride.