Ok here's an update. The car will definitely not go into reverse no matter what I do. When I try it's like the stick is banging into something metal and not moving any further. Rocking the car, moving up first, trying the other gears first, etc. does not help. Warning it up (going for a drive) doesn't help either. So I took a closer look. I have another 850 Coupe that goes into reverse without issue and compared the linkage. When I had someone move the lever while I looked at the linkage, but cars looked very similar, the linkage rotates a bit when attempting reverse, pretty much the same amount on both cars. The previous owner (I bought the car online) told me it went into reverse with some coaxing, but he could have been lying.
So with all of that said, I took Jeff's advice and looked for a loose mount. Sure enough, the bracket that holds the trans to the mount (2 13mm bolts) was loose, so I tighted it. Hard to get to the top bolt without a lift, couldn't tell if that one was loose too. I thought maybe that would fix it, but unfortunately the same problem. I also noticed the trans is wet and may be low on fluid, so I plan to tip that off, but I wouldn't think low fluid would prevent a manual Shifter from moving into a specific gear. There is no noise coming from the trans and shifts beautifully into 1-4. Clutch is very good too. I would try adjusting the linkage, but wouldn't know which way to move it, back or forward with the 2 bolts loose. Any other ideas? If I can't fix it I am looking at a huge job to replace the trans