Hi,
I recently purchased a 52 1/2 ton that has been through several owners. The truck has a 250 engine with a TH 350 tranny and the rear end is a 12 bolt, six lug setup. The guy I bought it from doesn't know what the donor vehicle was and I'm having a hard time trying to figure out what my rear end ratio is. Does anyone know the history on 12 bolt rear ends and how I can identify what vehicle mine came out of? What year of trucks carried the 12 bolt rear?
Thanks,
