904 shifting issues with the motor OUT

This is a long story, but that's because I want to be as detailed as possible in hopes that someone can point me in the right direction.

I rebuilt my 318 LA and it's ready to go in, so I was in the process of moving my 71 Scamp into the garage. Back when I pulled the engine, I drained all fluids including the transmission fluid (I'm not sure why, I'm new to this). The car has been rolled a few times with the motor out with no problems, but the last time I had slight trouble getting to shift into park. The car was born a column shift, but somebody before me converted it to a console shift.

My driveway is at a slight incline.

So, when I attempted to shift into neutral in order to push it into the garage, the shifter wouldn't catch on any of the gears. I felt some strange resistance, then 2 subtle clicks when I got down towards 2nd and 1st. Going back up towards park, same thing with the resistance and clicks.

I went underneath and was able to manipulate the linkage through all gears, and with one wheel in the air (I have an open rear) I could BARELY spin it. I mean, I had to bear hug it...and even then it was incredibly tight. With both wheels in the air, they spin freely with no resistance. I had a helper manipulate the shifter while I watched the linkage, and the pivot point where the shift rod meets the linkage was very sloppy. I was able to hold it while he shifted, and it tightened up, but still the same problem.

I had no issues until I moved it the last time into the driveway. Hopefully there's a transmission guru out there who might have an idea of where I went wrong.

I don't think you actually have a problem.
Here's why.
There is no way I would expect the linkage to work anywhere near correctly without the engine holding the trans in it's very specific running location.
AND there is a one way clutch called a sprag in the trans that when turned backwards way is WAY harder to turn because it causes you to have to spin the planetary gear set and clutch discs in the drum they are connected to.
AND with only one wheel in the air the gear multiplication through the spider gears is twice what it normally would be if you turned both wheels at the same time.
AND you can't hurt a trans by rolling the car around the driveway and garage.

That's my thoughts on it.