Auto transmission problem

[0ukami]

So I think my auto transmission on my '97 went out, not entirely sure. I didn't want to spring for a new transmission until I purchased my motor set, but if it's out, I guess I'll have to.

I drove to a parking lot and parked it. Went into a store, came back out. Started the car, put it into drive and pressed the gas, nothing. It just revved up. Put into neutral, it shifted fine, same with 1 and 2. Put back into Park and it started grinding horribly. It was only grinding when going from any other gear into park. Had to get a flat bed to take it home.

Anyone have any suggestions to what it might be? I immediately assumed the transmission itself died, but others of questionable technical savvy told me it could be otherwise (some sort of cable or linkage..?). What do you think Zilvia?
If it's out I'm just going to go for a 5-speed swap and get that over with now.

Thanks a bunch,
~Oka


Bonus Question: If I buy the 5-speed swap off of an S13, will there be any sensors off the S13 transmission that will throw codes or anything? Since mine is OBDII or anything? Also will the S13 drive shaft be compatible with the S14? Sorry lol I'm at work and don't have much time to search at the moment. Ignore this and I'll search later, but thanks if you can answer these for now