Gears!
"USA Standard Gears are not recommended for quiet running vehicles."
Personally the R&P is one area I wouldn't try to go cheap. It'll cost you much more to go in and fix a broken set than to buy the right stuff the first time. If you're looking for something a little less than Yukon's, try the G2 (Genuine Gear) line. It's 4WPs in-house brand these days.
If you're going with good gears and full master install bearing kits you're looking at a little over $500 for the rear and $300 for the front in parts. Labor will run 2-400 per diff depending on your area and you'll have another $150+ in gear oil if you go with something like Royal Purple.
If you're going with good gears and full master install bearing kits you're looking at a little over $500 for the rear and $300 for the front in parts. Labor will run 2-400 per diff depending on your area and you'll have another $150+ in gear oil if you go with something like Royal Purple.


