Yes, both the underdrive for the high range and the low range gears as well as 5.29s.Just to clarify, you installed the 10% underdrive on the high range and the low on the low range with your 5.29 and your happy with it. I am in the process of a engine rebuild and have the tranny out so plan to do the lower low range gears but was contemplating the under drive high range. I am on 37's and stock gears at this time. With the rebuild, money is tight so I cant do the ring gears right now but plan to in the future. I just want to make sure I dont have to go back into the transfer case.
I like the gearing a lot offroad. On the highway the RPMs are high, 3400 at 80mph, but it's right in the power band.