[Tjeep]

Hey guys,
I was wondering what would you think would be better? A atlas transfer case or 4.88 gear ratio. 37 inch tall tires. Which atlas should I get if I get one? Im going into some DEEP water (snorkeling). What are the advantages of atlas?

EDIT: I will drive on the highway but only to the trails so I want to hit at least 70


Thanks,
tom

 

[snwchris]

Unless your doing alot of rock crawling or comps, no real need for an Atlas t-case.

You need 4.88 gears for your 37's depending on your axles.

Chris

 

[Ibuildembig]

I have been in your situation before and I can tell you that the best thing in my opinion would be the atlas. You will still be able to run down the highway as fast as you want...and your stock gearset is stronger than 4.88's so there shouldn't be any breakage. Now, I can suggest a ratio but I need to know what gears you have right now.

 

[snwchris]

For the type of wheeling he had previously stated, no real need for an Atlas. A used Rubi 241T or even a 231 w/4:1 gear set would be fine and might be cheaper on the wallet, especially since more then likely he already has the 231 in his current jeep.

Chris

 

[aelwero]

While we're on this topic...

Putting in an Atlas would give you lower ratio without needing to regear your axles, yes? So if you wanted 37's on your JK, you could make up the difference by running your stock gears and changing the TC... Right??

 

[D51_06TJ]

Only changes the ratio in 4Lo. In 2/4Hi you are still running the stock ratio. An atlas costs more than the R&P swap.
D

 

[Ibuildembig]

Correct, but only in 4x4...wont' do anything for 2 wheel drive

A rubi case is cheaper than 1900? I might go that route too, but the cool thing about the atlas is the twin stick

 

[AOR]

Hey guys,
I was wondering what would you think would be better? A atlas transfer case or 4.88 gear ratio. 37 inch tall tires. Which atlas should I get if I get one? Im going into some DEEP water (snorkeling). What are the advantages of atlas?

EDIT: I will drive on the highway but only to the trails so I want to hit at least 70


Thanks,
tom

Tom,

did I miss what trans you were running. Also, what axles? In my '06 LJ Rubicon I was running 37s and 4.88s. I wished every day that I had gone with 5.13s (even as a daily driver). After the aFe CAI, Edge Trail Jammer, and custom exhaust was on it performed better but 5.13s would have been the ticket. I ran down the hwy at 70+ consistently on 4.88s.

Now if you have a manual trans you should be ok with 4.88s but an auto will be shifting in/out of OD all the time. If you have the coin, go with the Atlas or the Rubicon 241 if money is tight.

Allen

 

[Ibuildembig]

No way I would go that low in stock axles...pinion is waaaaayyy too small for me

 

[jdhallissey]

I run 5.13's in my jeep and love every second of it with my 5 speed.

 

[Ibuildembig]

Thats cool, but for me that is way too deep of a gear for the wheeling I do and for how much strength you loose going that low. I run a 5.13 in my crawler, but with a 42" tire and a standard 2 to 1 transfer case. I feel that alot of people go overboard on gears and make them too slow...after all, there are times when you have to have wheel speed

 

[AOR]

The smaller pinion to achieve the 5.13 ratio is why I went with the 4.88s. I am not a hammer jockey and wheel speed for where I wheel is not an issue. I'm just saying, that is what I would do in retrospect. Also, it was a DD and as such, and living in the foothills (2k~5k ft), I needed the lower end for the 37s.

 

[Ibuildembig]

Yup the 4.10 pinion on stock stuff is small enough....even a dana 60 fronts 5.13 pinion is tiny