If I remember correctly, no one uses our exact match. We have a 4.30 ratio. RS troopers use a 4.77 in the 1st gen, 4.56 like all second gen troopers post 92. I think the 1st gen amigo also uses 4.56. You might have some luck with an old pickup though. I think there were a couple that used a 4.30 ratio. Stock 4.30 diffs will be hard to come by. If it is just a diff whine and you need to change out the thrid member, might be cheaper/easier to change out both diffs at the same time to a 4.56 ratio. Those are easy to come by.