Thanks, box rocket. I think you just convinced me to keep my gearing the same and see how it does with the 33's.
It really depends on where you live and if you can tolerate your engine lugging around in low rpms, which these engines do not like. Even with 5.29s, with an auto I am always clicking the button to disable OD, even on slight grades, or the tranny temps will climb.
Also, with 33s, 5.29s, and an auto, my truck is hitting the same rpms in OD as a stock manual truck in 5th with 31s. The OD on the auto trans is TALL.