Rubicrawler vs atlas

[TormentedCrawler]

What's your guys input between the 2 transfer case upgrades. I've read a good amount and sounds like bang for the buck is the rubicrawler but anyone have any issues with adding it on?


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[TRLJNKY]

Ive been studying this as well recently. Going to follow and see what the consensus is. Good post

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[Rottenbelly]

My understanding is the rubicrawler will only work with the 07-11 models for some reason.

 

[wayoflife]

My understanding is the rubicrawler will only work with the 07-11 models for some reason.

I believe this is correct and if I recall, it has something to do with the length of the A580 transmission. I'm pretty sure the Rubicrawler will not work with a Rubicon transfer case. Of course, with a 4:1 crawl ratio, you wouldn't really need one.

Aside from that, we ran a Rubicrawler on VENGEANCE and it worked quite well.

 

[Brute]

I believe this is correct and if I recall, it has something to do with the length of the A580 transmission. I'm pretty sure the Rubicrawler will not work with a Rubicon transfer case. Of course, with a 4:1 crawl ratio, you wouldn't really need one.

Aside from that, we ran a Rubicrawler on VENGEANCE and it worked quite well.

I looked into a rubicrawler for my Brute...it is only for the 42RLE trans...


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[notnalc68]

My understanding is the rubicrawler will only work with the 07-11 models for some reason.

I believe this is correct and if I recall, it has something to do with the length of the A580 transmission. I'm pretty sure the Rubicrawler will not work with a Rubicon transfer case. Of course, with a 4:1 crawl ratio, you wouldn't really need one.

Aside from that, we ran a Rubicrawler on VENGEANCE and it worked quite well.

That's right. I looked into that before my transfer case swap, on my old Jeep.


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[TormentedCrawler]

Yeah I believe my understanding the rubicrawler only fits in the rubicon 4:1 transfer cases and must be automatic.


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[KYRubi]

The Rubicrawler will only work with the 42RLE transmission. It actually replaces the back section of it. The Rubicrawler gives you an extra shifter with 1:1 and 2.72:1 ratios. On a Rubicon transfer case, it gives you 1:1 and 2.72:1 in 2WD and 1:1, 2.72:1, 4:1, and 10.88:1 in 4WD. On a non-Rubicon, it gives you 1:1 and 2.72:1 in 2WD and 1:1, 2.72:1 and 7.4:1 in 4WD. It also ties into the computer of the Rubicon and allows the use of lockers when it is engaged.

 

[sc_rhino]

The Rubicrawler will only work with the 42RLE transmission. It actually replaces the back section of it. The Rubicrawler gives you an extra shifter with 1:1 and 2.72:1 ratios. On a Rubicon transfer case, it gives you 1:1 and 2.72:1 in 2WD and 1:1, 2.72:1, 4:1, and 10.88:1 in 4WD. On a non-Rubicon, it gives you 1:1 and 2.72:1 in 2WD and 1:1, 2.72:1 and 7.4:1 in 4WD. It also ties into the computer of the Rubicon and allows the use of lockers when it is engaged.

That's the best of both worlds. Just like an atlas 4 speed.

 

[KYRubi]

That's the best of both worlds. Just like an atlas 4 speed.

It's nice having the 4 speeds, but it's not exactly like having a 4 speed Atlas. With the Atlas, you can control the fronts and rears separately. You could have your front engaged and rear in neutral, and you get the 4 speeds in 2WD instead of 2 speeds. I didn't need those extra features. I really just wanted 2.72:1 and 4:1 because of the mix of terrain we have here in KY. I also wanted something that would install without hacking stuff up and would work correctly as if it were stock.

 

[ROCK HARD 4X4]

I had a RubiCrawler in my 2008 4dr Unlimited. Might go down as my favorite upgrade. I mated it to my non-Rubicon transfer case. I did the install myself, and had to make a custom stub shaft puller tool. Took a few hours but learned a lot in the process and I am happy I did it myself.

Driving: with 5.13 gears, my final drive ratio IIRC was somewhere at 7.4:1 on 40" tires. It's like driving a tractor. Approximately 1,000 RPMS per 1 mile per hour. Total control. You no longer have to break/gas to prevent lurching when driving over obstacles. Downhill descents meant no longer braking or riding your brakes. I greatly enjoyed the safety and confidence it provided.

Incidentally, I opted for the upgraded full transfer case and RubiCrawler steel / heim joint shifter cables. Never again had to worry about those plastic retainers.

- Jason

 

[NecessaryEvil]

Jealous this not an option for the 12+.


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[sc_rhino]

Jealous this not an option for the 12+.


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I think it has something do with the computer. It doesn't like the atlas 4 speed also.

 

[Sullivan]

I just recently swapped from a standard t case to the rubicon with the Rubicrawler. It has been great. I love the crawl ratio and even the 2wd low has been nice when playing around.
As for it being comparable to an atlas 4 speed? No. Atlas is just better, stronger and has the ability to do a front dig. The only reason I did the Rubicrawler was because I got a ridiculous deal on it. Otherwise you are not far at all from the cost of an atlas.



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[Sullivan]

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[KYRubi]

I think it has something do with the computer. It doesn't like the atlas 4 speed also.

My understanding is the computer for the 12+ auto can't handle more than 2 speeds for the transfer case which is why you can only do a 2 speed Atlas with it. Also, I've been told that you can use a 4 speed Atlas with the 12+ manual. I would call them first though to make sure.

 

[cayers71]

I have been looking at these guys' products:

http://www.jbconversions.com/products/np231j/complete_stdsye.php

They also offer RockTrac 4:1 setups with all the beefy mods.

I like the idea of a chain drive TC better for my road trip habits.

 

[TormentedCrawler]

Thank for all the input guys. Very informative info.


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[kawimoto]

very informative. really wish I could get the atlas 4 though I really cant justify truly needing it. this probably holds true for most. atlas 2 it shall be when the time comes

 

[Will P.]

The Rubicrawler will only work with the 42RLE transmission. It actually replaces the back section of it. The Rubicrawler gives you an extra shifter with 1:1 and 2.72:1 ratios. On a Rubicon transfer case, it gives you 1:1 and 2.72:1 in 2WD and 1:1, 2.72:1, 4:1, and 10.88:1 in 4WD. On a non-Rubicon, it gives you 1:1 and 2.72:1 in 2WD and 1:1, 2.72:1 and 7.4:1 in 4WD. It also ties into the computer of the Rubicon and allows the use of lockers when it is engaged.

I’ve got a 08 JK X with the D30/44 of course. I’ve heard that things like wheel studs are a liability with a Rubi crawler. Any thing like this an actual problem, or just BS? Anything else to consider due to the bigger ratios?