M200 axle strength??

[kah.mun.rah]

Right, mild off road like those pics you can get away with it.

Says the guy with a profile pic flexing on his front yard landscape...haha It's not a rock crawler but has seen tougher trails with it's D30 than most JLs every will. My point is that people need to stop worrying about those pavement princess chicken littles out there that claim that the sky will fall if you put 37s on a Wrangler.

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[kah.mun.rah]

About $1,000 for the rear. RCVs $1,400
Not exactly cheap but good insurance.

If you run chromoly (and it is pronounced like it is spelled with only one “m”) shafts you should also consider stronger ring gears. Instead of breaking the axle shaft (which can be an easy trail repair) that force that would have stopped after breaking a stock axle shaft will now instead travel through the chromoly shaft and right into your ring gear. Break a ring gear tooth on the trail and that is a lot tougher trail fix and a lot more expensive shop repair than an axle shaft. In other words, using stronger shafts on original gears is like replacing fuses in your fuse box with bigger amp fuses without upgrading electrically what’s downstream.

 

[TX_Ovrlnd]

For reference, this is Chrome Molly.

Not at all to be confused with chromoly.

Carry on!

 

[kah.mun.rah]

The majority of the off road community would disagree with you. 37s on a 44 is pushing its limits. Plenty of people blow up differentials with that setup. Can you get away with it? Sure. Is it strong enough for everyone? Far from it.

“Plenty?” Give me two real examples where people have “blown up differentials” with 37s on a 44.

 

[word302]

“Plenty?” Give me two real examples where people have “blown up differentials” with 37s on a 44.

lol, I’m not sure what you want for examples. It happens. You can easily blow up a Dana 44 with 35s. Horsepower and terrain make a huge difference.

 

[kah.mun.rah]

lol, I’m not sure what you want for examples. It happens. You can easily blow up a Dana 44 with 35s. Horsepower and terrain make a huge difference.

Yep. Didn’t think you could provide real examples. ?

 

[word302]

Yep. Didn’t think you could provide real examples. ?

What do you want, pictures? You obviously don’t hang out with many off-road clubs.

 

[donmontalvo]

Look at his profile, he's got a Rubicon. He's giving you really bad advice too. Pick up a pair of used Rubicon axles which are bulletproof with 35's.

Jeep have verified that in my build. 2021 JLUR, I moved up with 35s with Jeep's blessing.

 

[kah.mun.rah]

What do you want, pictures? You obviously don’t hang out with many off-road clubs.

Pictures, names of owners, etc. since there are “plenty” of people out there allegedly. A personal picture of you blowing out a dif with 37s would be nice too since you like to argue with all of us that have provided actual personal pictures of our difs not blowing up with 37s.

 

[nyglt56]

This is kind of entertaining to read thru. I think a comment posted earlier kind of summed it up though, the Internet is going to eviscerate anyone who puts big tires on a jeep with less than a D60.

If I have any advice to give to the OP: try it, if it breaks, upgrade. You'd be surprised how long things will last. Everyone is going to tell you their own best way of doing things.

Everyone said I couldn't run 37s on a HP30, and I am now going on 8 years with JKR 44s on 40s..(which if you didn't know, is basically a JK D30 with a larger R+P)

 

[Chocolate Thunder]

If you run chromoly (and it is pronounced like it is spelled with only one “m”) shafts you should also consider stronger ring gears. Instead of breaking the axle shaft (which can be an easy trail repair) that force that would have stopped after breaking a stock axle shaft will now instead travel through the chromoly shaft and right into your ring gear. Break a ring gear tooth on the trail and that is a lot tougher trail fix and a lot more expensive shop repair than an axle shaft. In other words, using stronger shafts on original gears is like replacing fuses in your fuse box with bigger amp fuses without upgrading electrically what’s downstream.

Who makes these stronger ring gears that you mentioned?

 

[Gunfighter]

lol, I’m not sure what you want for examples. It happens. You can easily blow up a Dana 44 with 35s. Horsepower and terrain make a huge difference.

The 392 XR has 44 axles and 35's - haven't heard of folks having issues yet.

 

[Zandcwhite]

Anything can fail, and anything can be quickly broken if you’re trying. I’ve broken Dana 44 shafts (ford hp early 80’s axle) on 35’s in a relatively light XJ with 150hp and high gearing (4.10’s and the stock auto with crap 1st gear compared to the modern 8 speed) being abusive. I’ve wheeled on the stock JL axles and shafts for 3 years on 37-38’s. Same type of trails, massively heavier, exponentially more torque, but wheeling like I want the rig to survive. Being in a $50k+ rig helps, as body damage is to be avoided. That old xj I bought for $3,500 and had no problem pounding it through obstacles like a pinball. I’ll take multiple lines, use the throttle where I need in order to clear an obstacle, and even pull cable where need be knowing full well I’m pushing the limit of the stock axles. If you are bound up with a tire pinned under/between rocks, a 100-1 crawl ratio, and decide to spool the turbo and let it eat, don’t be surprised when it eats your axle shafts or gears.

 

[JLJeepGuy513]

I personally run 37s with 30/44 setup. I haven't had any issues but that means nothing as everyone's experience will be different. I don't know if you guys are familiar with "offroad and chill" on youtube, but he tested the setup with 37s and torq lockers in front. He beat the hell out of the front axles trying to see if he could break it. It took some extreme offroading, bouncing and abuse before he could finally break the axles. he took the jeep out for weeks purposely trying to break it. Trust me..... most of you guys wont abuse the jeep as bad as he was! So to sum this up.... Yes it CAN break but most likely wont if you're careful.

 

[mgroeger]

This is kind of entertaining to read thru. I think a comment posted earlier kind of summed it up though, the Internet is going to eviscerate anyone who puts big tires on a jeep with less than a D60.

If I have any advice to give to the OP: try it, if it breaks, upgrade. You'd be surprised how long things will last. Everyone is going to tell you their own best way of doing things.

Everyone said I couldn't run 37s on a HP30, and I am now going on 8 years with JKR 44s on 40s..(which if you didn't know, is basically a JK D30 with a larger R+P)

Exactly! Finally a second dose of common sense. F'ing wheel it and if it breaks, learn from it and upgrade if needed. Some of these guys would have us believing we are taking our life in our own hands and risking damnation if we dare think of 37s on stock D44.
I also love when words like "majority" and "plenty" are thrown around which would indicate that said person has traveled the country far and wide and interviewed plenty of "off road clubs" to gather this vast data bank.

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