I have sifted through hundreds of posts and havent found anything about this.

I have a 1988 4 X 4 b2600i with the rear end is toast, it goes in 4 wheel lol...but am sure that is dangerous if the back decides to lock up.

I need to know what can I swap with this for I fear any rear for it is going to be hard to find, maybe 87-90 toy rears, I have no idea I am a classic Ford owner with import tuner cars. This is first 4 X 4 I have purchased and it was always a great truck in any amount of snow or mud.

Please, any information of where or what to search for is greatly appreciated.

Thanks