"94" S-10 Blazer: Main Transmission Seal

Currently seeking any information on my transmission problems with the 94 s-10 blazer. The main seal went on my trans and i have been getting the run around in the shops i have took it to. They of course want me to replace the trans but i have just done that roughly 10,000 miles ago. A couple buddies suggested it was problems with the torque converter or a burr on the bushing. The same guy told me the only way a main trans seal blows is for one of those reasons. If anyone has any suggestions, i am all ears on what the problem could be. Thanks in advance.

Did you overfill the tranny with fluid?

I drove the vehicle after the first main seal was blown for about a month/ 650 miles. Just like the first seal that went, it began to piss fluid. I could safely say it wouldnt be overfilled. thanks for you time.

i meant to say i drove on the new main seal for about a month/650 miles.