Before you go crazy with an engine/trans swap and all that goes with it, find out what you're dealing with. It doesn't necessarily need a rebuild. Could be as simple as a shift cable being broken or out of adjustment, or any of a multitude of smaller issues. Did it work when you got it? Since you're not familiar with it, the first order of business is to have someone local that knows these transmissions take a look at it and find out what the problem is before you decide on a solution. Your wallet will thank you.
