1995 Chevy S-10 1995 GMC Sonoma Transmission reverse proble

I have to be honest here, I can't say that I know the difference between slipping and draging in automobile terms, but if I had to choose, I would say that it is draging because I have a better understanding of what slipping is. Best I can describe it is that it feels like I'm working against the brakes. When I put it into reverse, it won't budge until I give it some gas, and even then it comes to a stop, like I had put the brakes on. Then I have to really put some gas into it to get it to go backwards.

I suppose 2wd then. I know it isn't a 4wd truck for certain.

Just a little update since getting my truck running smoothly again from the stuck EGR valve:

In regards to this issue, I've noticed that when I first put it into reverse, it will go backwards perfectly fine for a couple seconds then suddenly it wants to come to a stop like I'm putting the brakes on, then I have to really give it some gas to go any further. I haven't noticed anything broken yet but I will recheck to be certain.

I'm wanting to fool around with it. The way I figure, considering the shape the old spark plugs were in(I didn't buy this truck new and the plugs while in ok shape looked like they were installed back in 1995) the truck could probably use a new transmission filter, which is a good chance to check on the fluid. I know that a big issue is the stick. It's totally rusted away and it worries me just what the heck is going on inside there for that to happen. It could very well break at any given time checking the ATF.

But yes for all intent and purposes, it is at least full, but probably not clean from chunks of rust.