Topic: Gear Ratio/t-case opinions

[neale_rs]

So this would be a twin stick setup. Should I even be considering this or is this far more than what I need? I wouldn't mind a 4:1 "add on" to have if I ever need it.

Twin stick usually means two levers on the transfer case, like on an Atlas or D300 set up that way.

A doubler would be great for the gearing options.  I really enjoy having that flexibility.  On some trails the 2.72 TC ratio is just right and 4:1 is too low.  

But based on what I've seen the 2.72:1 would work great for you and would be the less expensive way to go.

[Jeffy]

So this would be a twin stick setup. Should I even be considering this or is this far more than what I need? I wouldn't mind a 4:1 "add on" to have if I ever need it.

Yes and no.  A true twin-stick has nothing to do with the a doubler box.  You have two sticks on the transfer case.  One stick controls the Front; Hi-N-Lo and one stick is Rear; Hi-N-Lo instead of having one stick control both 2, 4Hi, N, 4 Lo.  If you had the stock transfer case that's one stick and a doubler has one stick, you'd technically have two sticks as well but that's not what most people call twin-stick.

[aw12345]

Run the Jeep with 35's, wheel it, do the engine swap, wheel it find the deficiencies, wheel a little more hardcore and eventually you will find what works for ya.
When you find trails you cannot do due to the trans getting to hot from running at stall speed while not going no where it's time for deeper gearing in lo range. That or you are constantly riding the brakes since your compatriots have a better crawl ratio. Klune is a good lil box, but not a fan off it. People with those tend to hold everybody up crawling at to low a speed or they have hard time figuring out what gear they should run. lots of those are pared with a old Bronco transfercase which is prone to breaking under hi torque. Seen one of those go boom when we were having fun in AZ

[stan98tj]

Twin stick usually means two levers on the transfer case, like on an Atlas or D300 set up that way.

A doubler would be great for the gearing options.  I really enjoy having that flexibility.  On some trails the 2.72 TC ratio is just right and 4:1 is too low.  

But based on what I've seen the 2.72:1 would work great for you and would be the less expensive way to go.

What setup do you have?

[neale_rs]

What setup do you have?

Atlas 4 speed with 4.3 and 2.72 and the ax5.

[Bounty Hunter]

I would sweat the t-case later, after you wheel the new engine with the stock 2.72 case.  Changing the tcase out is easy enough later on.

Most Rubi's I've wheeled with were geared too low with 4:1 for general trail riding, had a lot of difficulty with enough wheel speed for most hill climbs.

[stan98tj]

I would sweat the t-case later, after you wheel the new engine with the stock 2.72 case.  Changing the tcase out is easy enough later on.

Most Rubi's I've wheeled with were geared too low with 4:1 for general trail riding, had a lot of difficulty with enough wheel speed for most hill climbs.

exactly what I was concerned about. Figured it was great for the rocks, but out here we do have regular forested trails with dirt/muddy climbs along with rocks.

[stan98tj]

What are my options if I want to keep my stock ratios and still have an option for a lower gear? Crawl box? Do they adapt to my SYE? Will I even have enough room back there?

[Jeffy]

What are my options if I want to keep my stock ratios and still have an option for a lower gear? Crawl box? Do they adapt to my SYE? Will I even have enough room back there?

The doubled goes between the transmission and transfer case.  You'll obviously need new driveshafts as the length will change for both.

[Bounty Hunter]

Which doesn't leave much rear driveshaft length, unless you do a 231/300 doubler.  Some have moved the 4banger engine forward to accommodate a range box in front of the transfer case.

[neale_rs]

What are my options if I want to keep my stock ratios and still have an option for a lower gear? Crawl box? Do they adapt to my SYE? Will I even have enough room back there?

One way would be to get a 4 speed manual transmission with a granny low 1st gear.

A Klune with a d300 would be another way, or a 4 speed Atlas.

A klune with the NP231 with a super short SYE would probably give you enough driveshaft length too.

[Jeffy]

Which doesn't leave much rear driveshaft length, unless you do a 231/300 doubler.  Some have moved the 4banger engine forward to accommodate a range box in front of the transfer case.

The Klune V and a 231 with a SYE can still fit.  It's pretty short though.  A Slim SYE would be better.  You can also move the engine forward 4-6" BUT you'll have to cut a new transmission hole and bend and extend the shifter as it will come up under the dash now.

[stan98tj]

One way would be to get a 4 speed manual transmission with a granny low 1st gear.

A Klune with a d300 would be another way, or a 4 speed Atlas.

A klune with the NP231 with a super short SYE would probably give you enough driveshaft length too.

The atlas would be the entire t-case, right? My understanding of the Atlas was that it was 1:1 and then another ratio of your choosing. Does the 4spd allow for multiple ratios? If so, perhaps it would be a good option as I've heard it's not much bigger than the stock t-case

[sharpxmen]

my doubler/D300 combo came to a d/s length of 18'' or so, a 231 with a klune would probably result in something like 11''  or 12'' which i think it's ridiculously short (i honestly don't think it will work but i never tried so i could be wrong.)

if i were to do it again I would get the atlas 4 speed for the syncros in the t-case (you can shift when rolling).

[neale_rs]

The atlas would be the entire t-case, right? My understanding of the Atlas was that it was 1:1 and then another ratio of your choosing. Does the 4spd allow for multiple ratios? If so, perhaps it would be a good option as I've heard it's not much bigger than the stock t-case

With the 4 speed Atlas the rear DS will have to be shortened about 2 inches.  You get a 1:1 ratio in high, a 2.72:1 ratio with the doubler part, a ratio of your choosing in the Atlas case (4.3:1 in mine) and you can run in low low also, about 11.7:1 in my setup.