Well unfortunately I still don't have enough information, so I suppose I will have to take out the transmission and check everything out, which is exactly what I wanted to avoid. I can't afford to have my car sitting in the driveway with all kinds of shit laying around, waiting for parts to arrive, which could take around a week.
I am still looking for your opinion on what could be wrong with my car. If anyone has any insight, I would greatly appreciate it. Meanwhile, I will be completing my research on DIYs, and gathering tools I don't have for the job. God help me.