Okay, I've been trying to get an e-locker third to replace my noisy rear diff in my 1989 4Runner. Why just repair when you can upgrade? I have 4.10 ratio, 22RE, Manual Hubs.

I finally got the e-locker third... But it's a 4.30 ratio. Of course, the salvage yard said it was 4.10, even claimed to have counted the teeth (out of state salvage yard, part was shipped to me sight unseen), but 43 divided by 10 is 4.30, I don't care how new the math is. I have had a really hard time finding an e-locker third in 4.10 (I guess I actually haven't found one yet) and I can't find one in 4.56 (tried for about two months). So, the question is, what are my chances of finding an IFS diff that will fit in my truck in 4.30? I've got to do something soon about that noise in my rear end (uh, my truck's rear end, that is), and although I'm not crazy about changing out the front diff as well for a 5% lower gear ratio, I'm at my wits end. So, will the front IFS third or full diff from a 3rd gen fit in my first gen? Did they put 4.30 gears in 1st gens? Or do you guys think that I can still find an e-locker third in 4.10? Or do you think it would be better off (cheaper) to just regear the one I managed to find? If I do that, I'll have to pay someone to do it (man, I hate that) and I'll go 4.56 (31" tires) and score a used front diff from somebody.

Hey, thanks in advance for reading this, even if you can't help out. It's nice just to be able to rant about it to people who understand, since my wife and most of my friends just glaze over when I start talking about it!