The Unlimited will suffer a bit on 33's for the trails you mentioned. I'm never comfortable recommending that model stay on 33's and on 35's the low pinion 30 is highly suspect. The HP 30 will serve you better, far better on 35's that rig needs to be on.Jerry and PurpleTJAZ: Thanks for the wheeling examples. Sounds like keeping the Dana 30 with a 27 spline chromoly axles is the way to go. Both of you are saying I can go up to 35s later. The 30 spline inners may be overkill at this point. I don't think it's worth calling and changing the orders at this point. It's only a few bucks more.
Since you mentioned broken ball joints...On another post, Jerry has said to go with the Spicer ball joints. Should I replace them when I have the axle apart regardless of condition? The Jeep has 78K miles on it?