Case 530 CK Diesel

Hello all, I have a Case 530CK industrial Diesel with front end loader and the engine runs great but the tractor will not move? I bought this tractor with this problem so I don't know what it was doing when it quit. I drained out all of the fluid in the torque converter housing and there was a lot of water and gunk inside, I put in new fluid and it still will not move? I haven't torn into the torque converter yet, because it has a loader and some parts are welded I would rather not...

Case 530 CK Diesel

Case 530 CK Diesel