I do have plans to run a bigger tire but that's off a good ways. For now though probably going to stick with the 33's. Like I said a lot of guys I've seen that are running the same setup, run the 4.56's so seems like that's the way to go. Take in consideration I'll probably have a fresh rebuild on the 4.0 and the AX to go along with the regearing. Love to do a v8 swap but that's just not in the picture right now
Are you paying a shop to do the work or will you do it yourself?
If you're doing it yourself, I would say go ahead and re gear to 4.10. After that I wouldn't go any bigger on tires than the 33. There's a good chance of breaking something, most likely in the rear (odd, but the weak link is that D35, not the 30)
If you're paying a shop to do the work, you'll spend almost as much re-gearing as you would finding another axle (D44) with the gearing you want and have them weld on some spring perches for you. You can get up to a 35" tire with no issues and even a 37" tire with a few axle upgrades. When you do plan on wheeling it heavily, I would definitely find that lovely '78/79 Ford F-250/350 Dana 60. It's almost a direct fit bolt in replacement.
My first jeep was a 94 YJ 4.0. I loved it. I also had to fix it quite a bit. Another thing to keep in mind is the steering gearbox won't handle larger than a 33" off road. I broke a couple of them. If you need a bolt on replacement with a bigger piston, a 98/99 Dodge Durango steering box (get the one for the snow plow setup; it has more turns from stop to stop) is a direct fit bolt in with a larger piston. It works great and lasts a long time (I never had to replace it after that).
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