Join Date: Oct 2007
Location: Richmond, Virginia
Well, first of all, people will practically pay YOU to get a TJ D30 with 3.07s out of their yard, so whatever you do, don't pay that clown $1700 for one.
Should be able to score one from CL for $100 maybe less.
It is pretty simple to install yourself also.
If the sound has you worried you should start looking on Craigslist for a replacement D30.
If it were me, I would drive it until it grenades, and then have the spare sitting there ready to swap in.
People here will tell you to get a cherokee hi pinion D30 as a swap. that is fine, it is an upgrade, but if you have no plans on going to bigger tires, with as cheap as they are, I would personally just always keep an extra factory D30 around to swap in.