[widebody911]

The MFI pump is driven from the left camshaft. If you have MFI and this belt breaks, you're dead in the water. If your MFI was removed, I have no idea why this belt would still be present.

As the the jumping out of gear, sounds like your transmission is toast. There's a slight hail-mary chance that your coupler has gone south, such that you're not getting all the way in gear. If that's not the case, you're in for a very expensive new year. I had this happen to me. In my case, the synchro *broke*, and bits were floating around in the transmission, causing all kinds of mayhem. In neutral, sitting in the driveway, the car would buck and shake. It was kinda scary to watch - like something out of a Stephen King movie...