Broken Ring Gear

[ZackMill]

Everything in red tells you everything about the op’s driving style. Ever if it was a fully trussed 44 with 5.38’s this would have still happened. As the ring gear is extremely smaller in thickness. Let’s leave it at op learned a lesson and the dealer will
Not be replacing this under warranty as the driving style to mods where the exact cause of the ring failure

Learned a real lesson lol already had gears and axle on the way. Them rubi wheels you got look really good on the ole base model. Congrats.

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[Maverick909]

Learned a real lesson lol already had gears and axle on the way. Them rubi wheels you got look really good on the ole base model. Congrats.

Sure does thanks.. but it’s not a base model mate.

 

[chevymitchell]

I have a 2019 Sahara Unlimited with 32k miles on it and I had the ring gear absolutely shred to pieces while driving on asphalt…..never off-roaded. I went to my local dealership and was told “any modifications void warranty,” and I said that’s not true, that you have to prove it, I found the act “1975 Magnuson-Moss Warranty Act.” Explain to me how I am denied by a dealer before they even look into the issue. @JeepCares

This is simply gear deflection.

Depending on how much deflection, the housing may be toast.

Putting new gears in this or gearing the rig properly for tire size at this point may not work.

You will need to get the housing mic'd. for trueness. For there to be enough deflection for the pinion to reach the outside of the ring teeth like that, there is likely permanent damage to the housing in terms of trueness.

Don't put any money into a new set of gears, regardless of ratio, for this housing.

Warranty... definitely not.

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[roaniecowpony]

42s on a D44...that's way out there.

Call of hands...who's surprised the axle spit up?

 

[chevymitchell]

42s on a D44...that's way out there.

Call of hands...who's surprised the axle spit up?

It's a D35.

 

[roaniecowpony]

It's a D35.

Eeek!

 

[CarbonSteel]

Eeek!

So much for higher gears (lower numerical numbers) being stronger...(I know, I know).

 

[grimmjeeper]

So much for higher gears (lower numerical numbers) being stronger...(I know, I know).

 

[AnnDee4444]

 

[Zandcwhite]

I'm all for gearing on the slightly higher side as I do push freeway+ speeds on long road trips, but 3.45s and 42's? Why go to a 44 now if proper tons are the plan anyway? Unless the 44 was free it seems like pissing money away for an axle that may result in the exact same failure shortly after install if driven aggressively?

 

[chevymitchell]

I'm all for gearing on the slightly higher side as I do push freeway+ speeds on long road trips, but 3.45s and 42's? Why go to a 44 now if proper tons are the plan anyway? Unless the 44 was free it seems like pissing money away for an axle that may result in the exact same failure shortly after install if driven aggressively?

A D44 will absolutely fail in the same way.

A D60 isn't enough for a 42" tire. A 42" tire to a 60 is the same as a 40" to the 44.

It's pushing redline of the axles limitations. Even the ProRock44/60 set (JL version) has a max 38" tire recommendation. The JK version of the ProRock44/60 has a max 37" tire recommendation.

The 60/60 set-up from Dynatrac is for a 40" tire.

The OP absolutely needs 60's a minimum. For true reliability; an 80, 14 bolt, or equivalent is needed.

Anything less on a 42" tire just isn't enough. Too much cost involved to gamble.

I run a 40 on a 60/80 set-up. I couldn't imagine a 42 on a 30/35... play stupid games, win stupid prizes. Lol

 

[Zandcwhite]

A D44 will absolutely fail in the same way.

A D60 isn't enough for a 42" tire. A 42" tire to a 60 is the same as a 40" to the 44.

It's pushing redline of the axles limitations. Even the ProRock44/60 set (JL version) has a max 38" tire recommendation. The JK version of the ProRock44/60 has a max 37" tire recommendation.

The 60/60 set-up from Dynatrac is for a 40" tire.

The OP absolutely needs 60's a minimum. For true reliability; an 80, 14 bolt, or equivalent is needed.

Anything less on a 42" tire just isn't enough. Too much cost involved to gamble.

I run a 40 on a 60/80 set-up. I couldn't imagine a 42 on a 30/35... play stupid games, win stupid prizes. Lol

We got away with 38's on stock Rubicon 44s, but I was well aware of the potential for failure. I'm fine with pushing the limits especially when they are stock parts and there's no money or time invested, but once you push it too far and have that failure, why go half assed with the fix? If it's about saving the money, I'd have more respect for slapping in another stock 35 that you can find for free until you save the money to actually fix it. Ran 42's on dana 60s in my old wagoneer, but that wore out 360 was probably putting out 150hp on a good day.

 

[chevymitchell]

We got away with 38's on stock Rubicon 44s, but I was well aware of the potential for failure. I'm fine with pushing the limits especially when they are stock parts and there's no money or time invested, but once you push it too far and have that failure, why go half assed with the fix? If it's about saving the money, I'd have more respect for slapping in another stock 35 that you can find for free until you save the money to actually fix it. Ran 42's on dana 60s in my old wagoneer, but that wore out 360 was probably putting out 150hp on a good day.

There's a balance, of course. You determine what should be done and then compromise from there.

Lol...yeah, for the displacement, the 360 just didn't have power, but I always loved the way they sounded.

 

[guarnibl]

We got away with 38's on stock Rubicon 44s, but I was well aware of the potential for failure. I'm fine with pushing the limits especially when they are stock parts and there's no money or time invested, but once you push it too far and have that failure, why go half assed with the fix? If it's about saving the money, I'd have more respect for slapping in another stock 35 that you can find for free until you save the money to actually fix it. Ran 42's on dana 60s in my old wagoneer, but that wore out 360 was probably putting out 150hp on a good day.

Yeah, agreed. I'd probably just put another 35 in it assuming it's really cheap, if it's a temporary fix. A 44 with 5.38 gearing specifically is still a really weak proposition for a 42" tire, which typically are extremely heavy (not a lot of options). At least 38's/39's you can find and keep somewhat light still if your goal is literally just tire height.

I run 40's on a D44 w/ 4.56 gears in my 392, and I fully expect it to fail at some point. If it makes it another two years it'll get axles at that point.

 

[Gregj]

I’m surprised no one has mentioned the need to do this https://www.jlwranglerforums.com/fo...ission-service-diy-how-to-instructions.94302/.
His transmission has been working hard to turn those huge heavy tires.
Gregj

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