There are 2 main routes to take when owning a 4x4. Do it all at the same time, or build it up as you go. Neither one is better than the other. Do the one that makes the most sense to you. Keep in mind that changing gears is expensive, like $400 or more per-axle expensive. That's why tracking down a stock 4.10 Dana 30 can make so much sense. If you think you'll see 37" tires in the future, but only 33s now, you can either bolt-in a Dana 30 to use in the interim, or build up a Dana 44 now. But you'll want much deeper gears for 37s over 33s, so do you regear the Dana 44 twice? I'm flat broke, so these decisions tend to be much simpler for me. :cry: