1992 Chevy S-10 cranks then suddenly stops

Engine problem
1992 Chevy S-10 Four Wheel Drive Automatic 200002 miles

I have an s10 blazer with a vortec 4.3L that will not start, it had sum bad gas but thats besides the point, ok when I try to start it it will sumtimes stop like it has a thrown rod. If I put it in neutral and push it a few feet it will do it again, but once it gets jamed thats it, just a loud click from the starter. I dont get it tho cuz its an automatic so when I push it its not doing anything to the motor. Also I have had to replace the starter because the old one was shatterd. Iv checked the batery the new starter and part of the flexplate. Is it possible it culd b the transmition jaming up? After it clunks to a stop sum trany fluid leaks out from the torque converter area. I got it to run then it stalled on the bad gas. And now its clicking again. Im tired of pushing it, I cant even run a proper compression test, also the oil looks fair no metal shavings or coolant. Im stumped guys