yeah i agree thats why i'm changing mine just so the what ifs dont come up ever.

 

If you have to ask, you probably shouldn't do it.

 

regearing would actually make more torque at lower rpm therefore you wouldnt have to use as much throttle compared to a higher gear

 

RPM has nothing to do with it. You would have more torque all around with lower gears therfor making it worse. Its do-able, but you need to know its limits and wheel easy, and even then know that if you get yourself in a pickle your going to want to keep spare shafts with you on the trail and know how to change them. If you are just mall crawling it and DD you wil be fine which it sounds like what your using it for. If you NEED 36's, then you are doing some wheeling krawling that needs to be driven hard. Therfor probably going to need bigger axles. If you say "oh well I take it easy and dont drive / bounce off rocks" then you would probably be fine with 31's or 33's, let alone 35's. Sounds to me like a higschool student trying to impress his friends with big tires.

 

well i have 33" mud rovers on now they seam to work great as far as traction when aired down. do you think bigger tires or putting a locker in the front would make more difference.

 

The Chrysler 8.25 with 29 spline 1541H shafts will be more than strong enough to hold 35-36 inch tires. The Dana 30 HP is between the low pinion 30 and the Dana 44 in strength and with Alloy 30 spline axles and a truss it will handle the 35-36 inch tires just fine. Lower gears will help the axles live longer because he can crawl and not have to hammer up stuff.

 

What the hell? If your jeep does fine than why are you looking for a locker or bigger tires? Yeah they will make a difference but if you dont need it dont do it. Its just more stuff you have to fix. Bigger tires, have fun with replacing shafts/wheel bearings / u joints/ ball joints more often. locker, even more so. IF IT AINT BROKE DONT FIX IT.

 

Ive got the same axles, running 35s...have run it this way for about 2 years...never a problem. Survived a pretty intense moab trip on a couple tough trails, and a lot of other trips here and there. BUT id say its only a matter of time that i get into a bind and snap something. Thats why i have a 44 waiting for the rear...just sayin, its not as sketchy as people make it seem

 

well theres stuff out there i want to climb and with 33 tires i always high center then it drags so far this has caused me to rip the threads out of my frame on the cross member. my brother has 36" tires and lockers on his but runs chromo axles he can climb 10 times the stuff i can. and you know how it is you just can't have little brother out doing you lol

 

Don't think I have ever seen a 14 bolt in an XJ, but I want one!!

 

theres an xj with a gm14 and 49's. hes a member on here

 

bottom line no matter what you run or how big your axles its gonna break sooner or later

 

Good point.

36" is too big for any stock XJ axle. 36" definitely requires re-gearing. ROCKs are much harder on axles than mud or high rmps ever will be.
Engine RPM is not really a cause for axle breakage, but wheel speed and torque is. Lower gear mean lower wheel speed at higher engine RPMs, danger here is that while the wheel may be turning slower they have more torque behind them.

 

REGEARING IS DEFFINETLY a must with bigger tires ,when not regeatred it takes more power and torque to get them turning with regear it takes less power and torque to get them turning

 

You are so right about regearing when going to bigger tires. The reason guys that rock crawl call for crawl ratios of 40 to 60 for an automatic, and between 60 and 100 for a manual, is so they can go over obstacles slowly and carefully and not break axles and suspension parts.