Rearend?

What are the specs on the stock rear end in my 87 b2000? Gear ratio, size, traction control/lock, etc?

Thanks

If it is stock it is a 1:3.91 gear set.No posi,no trac lock,no nothin.Lol.If it happens to be a 4x4,I think they are 1:4.01 gear sets.BJ