REar axle code

Hello eveyone, I had a flat tire on the pass. rear and notice that the first three letters of my rear end code was marked across the axle and drum. Can anyone decode my axle code and tell me what gear I have. Code: 6LEKO28, 81 Caprice Coupe w/305 and 2004R.
Thanks for all that you do.
Ram.

to find out i need the spid which is on the trunk lid, g80 means a posi, i cant remember the other off hand