D30 Ring/40" Comparison

[chevymitchell]

For all of you guys running a 37"+ tire on a D30, this will give you some perspective on the borrowed time you currently possess. Lol.

If the ring is smaller than the bolt pattern, one must resist going above a 37". (This really should be 33".)

For reference, Yukon doesn't recommend anything larger than a 37" for D60's.

Pic below are Pain Train’s 40's showing the D30 ring out of a Sahara I regeared last weekend.

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[ChuckQue]

So…38’s on a 44 is borrowed time? ?

 

[chevymitchell]

So…38’s on a 44 is borrowed time? ?

Yeah.

I'm not sure where everyone gets their axle size and tire size idealogy from. Lol.

A 38" tire is huge and too large for the D44 pinion cross section, let alone the amount of flex the housing goes through.

Basically, anything about above a 35" on a D44 is pushing it. The MFG knows this, of course, which is why a lot of warranty claims are turned down for drivetrain stress.

 

[word302]

Nah it’ll be fine. Just make sure to get it on video.?

 

[J0E]

That's a conservative recommendation. Lockers can potentially double the strain on the R&P. It's generally recognized the rear axle needs to be stronger than the front because when climbing, there's more weight and strain on the rear. I think the Dynatrac XD60/XD80 goes a bit too far. A 60/70 or better yet a Jana 76/80 would be more balanced.

I think those numbers are why Jeep doesn't sell anything with 37's, they don't want to step up to bigger axles. The Bronco Raptor has 37's with a D50 in the rear, but not in the front.

Experience has shown if you avoid shock loads, a D44 with lockers can crawl with 37's. There are many D60's on 40's that do more than crawl successfully.

I've got the Dynatrac XD60/XD80 on my Juggy and I bounce it pretty hard on sticky 43's. So far I've only busted the front hubs, which I replaced with Yukon drive flanges.

I crawl pretty aggressively in my JLR on 38's and I don't consider my time limited, as long as I don't bounce it. I'm far more concerned about long recoveries on 4+ trails of dead rigs than crawling.

 

[GrayWolf.Overland]

If you dont jump and be very conservative on throttle control and turning your front.. you can wheel a Front M186 on 35s with a stout locker (like ARB) for a long time.. yep there is a chance it will eventually give up but thats the same case with 37s and M210s

 

[J0E]

If you dont jump and be very conservative on throttle control and turning your front.. you can wheel a Front M186 on 35s with a stout locker (like ARB) for a long time.. yep there is a chance it will eventually give up but thats the same case with 37s and M210s

I watched my buddy in his JLS on 35's with the front wheel turned and a slight hop break the front axle u-joint, the same u-joints my JLR uses. I went home and ordered RCV's.

That's key, crawling, no bumping or bouncing.

 

[2nd 392]

Warranty claims turned down due to drivetrain stress— Yet Jeep presents concepts— Departure 4Xe, Rubi 4Xe, sideburn with 37’s — Scrambler 392 & Magneto with 40’s. No axle upgrade mentioned in the original presentation other than Magneto, 80/60.( unless I missed it) The 392 unveiling announcement video with 2 running around in the sand had one on 37’s also as I recall ? …….. Still hoping for the Departure fenders. ?

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