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Old 06-08-2014
4X4 More 2  4X4 More 2 is offline
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Hi guys I was just looking on the Jeep web page and they said that the Latest Jeep Wrangler JK Rubicon has this..
"the Wrangler Rubicon is equipped with Tru-Lok® Electronically Locking Differentials, Mud Terrain Tires, the Rock-Trac® Transfer Case, a 4:1 Low-Range Ratio and Rock Rails. A 73.1:1 Crawl Ratio with the manual transmission"


But can anyone explain what it is?

What does the crawl ratio mean? is that number good?

Sorry guys only new to this
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Old 06-08-2014
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Bigger the number the slower the vehicle will crawl.

For the Rubi manual it's: 1st gear ratio x X-fer case ratio X axle ratio
4.46 x 4.0 x 4.10 = 73.1

Simples
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Old 06-08-2014
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In other words, in low range, in first, at idle, it will do less that 1 kilometer per hour (well, at least my manual rubi does)
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Old 07-08-2014
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Means you can use the vehicle's torque at low speeds easily without riding the clutch....for climbing or traversing broken ground.
Rubicons are a very seriously capable 4WD right off the dealer floor......the regular JK's are no slouch, either.
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Old 07-08-2014
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interesting-)

must be pretty low gearing for a factory 4wd then..
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Old 07-08-2014
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You are correct.
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OK I am surprised that the Vintage WW2 Willys jeep was not lower geared?

1st gear 2.665:1
2nd 1.564:1
3rd 1.000:1

And a 1.97 low range..

with 4.8 diffs..

Thought It would be lower geared for the rough country they drove in ww2
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