99 Dakota

This week I am getting a 99 V6 manual club cab. It has over 100000 on the clock but it is very solid still and very clean. Also I know the guy personally and he's an older gentleman and drove about 150 miles round trip to work daily. I am pretty excited just because of the condition its in. I had a question though, would this truck have a limited slip differential, its just rwd not 4x4.

It's probably a sure-grip. Most 2wd trucks had them.

only the v6 sports and the rt had the limited slip

Raise the rear so that you can spin the tires in neutral. If both wheels spin in the same direction than it's a limited slip type diff. If they spin in opposite directions it's a standard diff.