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Unread 07-16-2010, 07:37 AM   #1
viperbluelx
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4:1 low transfer case, why do I want one?

I know the Rubicons come this way from the factory so obviously it's gotta be an upgrade over the factory TJ transfer case. I have 4.10 gears and 33's with a 32RH and in 4LO mine seems geared very low and it crawls in 1st gear. When we go offroad it's usually tight trails, hill climbs, rocks, and a few small mud holes when they are unavoidable. How would I benefit from a 4:1 low?

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Unread 07-16-2010, 07:42 AM   #2
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4:1 would put you into even more of a "crawl gear". Combined with an auto tranny, you'll have a dirt cheap and fair reliable crawler. You'll just break everything else. I'm a mud guy. I like my 2.72 gearing for mud so I can spin my tires with ease in a sticky situation. A 4:1 would be way to low for someone like myself.
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Unread 07-16-2010, 08:21 AM   #3
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I really enjoy the compression braking when going down steep hills (I have a manual). Both ascents and descents are very controllable.
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Unread 07-16-2010, 08:48 AM   #4
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If you don't do a lot of technical rock crawling, I wouldn't do the swap.

On flat ground in 4L with the auto in 1st gear I can hop out of the Jeep and walk along with her. I have to use two feet on the brake pedal while doing technical crawling or she won't stop right away. Going down a steep grade it's absolutlety amazing how slow the Rubicon goes when engine braking.
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Unread 07-16-2010, 08:58 AM   #5
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as stated 4.1 is nice on rocks and in very steep terrain however for what you've stated that your doing its not really necessary.
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Unread 07-16-2010, 09:14 AM   #6
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I had 33s, 4.10s and the 32rh...I would do almost 5mph downhill if I let off the brakes. That is what made me desire 4:1.
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Finesse in crawling looks way cooler than momentum.
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Unread 07-16-2010, 10:01 AM   #7
Zen
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I had 33s, 4.10s and the 32rh...I would do almost 5mph downhill if I let off the brakes. That is what made me desire 4:1.
Your avatar is the right environment for 4:1 .

If you read his post and thought "5MPH doesn't seem fast." You don't need a 4:1 transfer case.
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Unread 07-16-2010, 10:18 AM   #8
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4:1 becomes even more prevalant with a stick, when your geared real low you no longer have to do a ton of clutch work on the rocks. you can just idle over so much more. Going from 3.07's to 4.56's I am in love with the new crawl ratio I have, but in the grand scheme of things its still not that low, and in the real technical stuff that lower ratio would be great.

look at the yota guys, many run two range boxes with one or both having 4.7:1 gears. when it comes to rock, crawl speed is king.
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Unread 07-16-2010, 10:39 AM   #9
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Yeah with 4:1 it's fun to stick your feet outta the jeep on a gnarly rock garden and see peoples eyes widen. That's with the 6 speed.
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Unread 07-16-2010, 06:10 PM   #10
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If you do get the 4:1 low range, get the 2Low to go with it...
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Unread 07-16-2010, 06:13 PM   #11
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I haven't even wheeled with my 4:1 yet in the new Rubicon but together with its automatic and 4.88 gearing, I can't wait to get it onto the rocks. Hopefully it'll be ready for a Big Bear group run scheduled for the end of this month but it's gonna be tight.
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Unread 07-16-2010, 06:17 PM   #12
danielbuck
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Quote:
Originally Posted by dirt_j00 View Post
I really enjoy the compression braking when going down steep hills (I have a manual). Both ascents and descents are very controllable.
yea, it's amazingly slow with 4:1 in 1st 4lo with 4.10 gears, going down steep hills I often never even have to hit the brakes, haha! And up hills too, nice and slow. I originally thought I'd never need 4lo very often, but I find that I like it alot! I don't do mud or water though.

And first gear on mine seems to be real slow even in 2 wheel drive with 32" tires and 4.10 gears. I hardly ever use first gear on the street, I pretty much always start out in 2nd. Maybe the 6 speed has a lower 1st gear than the other transmissions?
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Unread 07-16-2010, 06:18 PM   #13
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Quote:
Originally Posted by viperbluelx View Post
I know the Rubicons come this way from the factory so obviously it's gotta be an upgrade over the factory TJ transfer case. I have 4.10 gears and 33's with a 32RH and in 4LO mine seems geared very low and it crawls in 1st gear. When we go offroad it's usually tight trails, hill climbs, rocks, and a few small mud holes when they are unavoidable. How would I benefit from a 4:1 low?
Beasley Knob doesn't need 4:1
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Unread 07-16-2010, 06:24 PM   #14
freeskier93
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4:1 is great for automatics that do rock crawling because it allows them to move slower at idle. With a manual it would make it 1000 times easier to do anything because you don't have to use the clutch as much, if at all.

Will also make going downhill easier.
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Unread 07-16-2010, 06:35 PM   #15
breckboarder55
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If you have to ask you probably don't need one (yet anyways).

Put your money towards something you want/need until you reach that point. Don't buy it because its the thing to do.
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