Crawl Box-2.72 or 4.0:1 will mate to either 16 or 19 spline TLC transfer case-$1895

Front Kit-to mate crawl box to 4 speed 16 or 19 spline output (1" thick)-$575

Rear Kits-16 spline (early 4 speed) and 19 spline (stronger split case)-$280

Shifter kit-custom brackets, shifter cable, heim joints and threaded rod-$139

Kits for long 4 speed (A440) and 5 speed (A442 auto) in development

_________________________________________________


My thoughts? I like it, all it adds is 6.5" to your drivetrain!

If I were to do this, I would upgrade to the split case for strength.

I wheel with guys that have these and they are super nice.

Total cost-$2889

For reference, I paid $2200 for my Atlas and $500 for adapters and upgrades, so this is right in the ballpark and you get to keep the smooth shifting LTC transmission.

THought I would pass this along...

Not trying to be excessively picky, but it adds 8.5" with the adapters. A good item, I'll admit, though I'm going to try a Rock Box since I went 10 spline on my NV4500 and have a good set of 10 spline/2.31 "3 spd" TC gears.
When they come out with the H55F front kit it will be possible to run a one piece case (including billet or cast iron) behind an H55F with certain adapter choices. I suppose that could save a guy some $$$ especially if the rig already has a PTO winch. Might be possible to run 3spd gears, even, using the out of production/hard to find "transition gear" and the Datsun B210 wheel bearing for the rear input shaft bearing for the TC.
Charlie
PS: Let's see, on a LWB rig one could stack a Klune to a 203 possibly without any adapter and get 11:1 TC/crawler ratio, ~16:1 with 3:1 low range gears. Considering how cheap 203s can be (like free) 3-400:1 is within reach.
Charlie

Originally posted by Charles Aarons
Considering how cheap 203s can be (like free) 3-400:1 is within reach.
Charlie

One Question.....why?

As long as you have a torque producing engine (read, anything bigger than a 22R) then anything over 125:1 and you are doomed to slickrock only.....

Around here, like in Poteau and Clayton, OK it is ofter necessary to get wheelspin to make it up steep inclines with loose rock or a layer of slime or mud on the rocks.

My Cruiser at 97:1 with the 2F is PLENTY low for me.

That is until maybe I get some 42's :) :) :smokin:

I tend to agree with Nolen, once you get past the 150:1 mark you're in the cool-but-relatively-useless territory unless you wheel sandstone exclusively. I can't think of an application where you'd want more than 150:1 with a Toyota drivetrain, unless you're running really big tires.

As for the cost comparison, Charlie, running the billet 3-speed case will offset any savings, except for those who already have it and or are lucky to have the cast iron case. If you have to start from scratch, might as well go with the much stronger and quieter split case.

In my case, I can't use the AA RockBox, so the idea of a Klune-V is *very* attractive.

Nolen, is the price the same for 2.72 and 4:1??

Let's see, 4.99x4x2.276x4.11= 163:1 without *any* changes in the current drivetrain, and I already have a 2.276 split case ready to rebuild! Of course, saving up for the $4K+ modification might take some time...

I really agree, the 110:1 in my F350 is more than enough even with 39" tires; I'd settle for 70-90 in my BJ40. Nobody "needs" 3-400:1, somebody might WANT it, though.
Mainly, this Klune seems to be a good thing for 60/62s once he gets the front adapters fixed up.
One thing regarding ratios: on Klune's site they give ratings for torque
2.7:1 Input 1350 Output 3500 Direct 4000
4:1 Input 550 Output 2200 Direct 4000

Big difference. Based on that, I wouldn't want anything but the 2.7:1 in a wagon. With an H42 it would take about 160 ft-lb at the flywheel to break he David in low. With an H41 or H55F, only 115 ft-lb. It really looks to me like the David isn't suited for anything bigger than a Samurai, with such a low input torque rating in low. What makes it so easy to break is the funny planet gears. Bigger ones engage the sun gear, smaller ones in line with the bigger ones but offset a bit engage the ring gear. They must be the weak point. The 2.7 version just has normal one piece planet gears.
Charlie

The David has held up in a variety of rigs that have a LOT more torque than 115ft/lbs.. And I still have not heard of one breaking. I would not worry about that.

I don't get something here. I know in some places it is a real benefit to have enough wheelspin to make it up a hill. If you opt for the Klune you still have that option. think of it. You get a stock 2.3 (or whatever your normal low range is) a 4.0 low range and then a 9.2 (or so) ultimate low range for when you want slickrock... I believe that having the options to go to lower gearing is the benefit of these bad boys... Why would you be "limited" to slickrock with one??? Hell I feel that the Klune is a much better option than the atlas for the main reason that you still have a 2.3:1 low range available.

Options make the rig. One set of gears does not work for everything...

I'm still thinking that Rocbox for my application. But we may see. I need lower gears....
And I love the options that are comming available...:D

Wheeling out East (Maine to Tellico), much over 100:1 has its drawbacks. The people who are using them on the trailrides think its cool to climb up a rock while everyone has time to eat their breakfast and possibly lunch. It would make sense if this was to minimize damage, but everyone with a lot less gear in their rig makes it unscathed. Yeah it does boil down to using your head, picking the right gear for the situation, but IMO I'd rather spend that money on something more practical for most wheeling situations.

For the type of wheeling that I mostly do, rocks, I think the lower you can go the better off you will be. You can never be too low. I would rather have the OPTION of selecting a super low crawl gear rather than being stuck with one low crawl gear of 79:1 (sm420-2.3-4.88s). If you were to swap in an Atlas 4.3, then you would have 148:1 low. This works great for dry rock crawling, but what about when you need wheel speed?.......SHIFT to second gear 3.5*4.3*4.88=73:1
I think most people forget that there are more gearing options in the tranny than just FIRST gear.

With all that being said, I sure think my 67:1 is low enough for most situations, but there is always that one time where I wished I had a lower gear OPTION. Instead of going lower, I had to gas it some to make the obstical and that is when I got some damage. Oh well, it happens.:D

Originally posted by Eric
This works great for dry rock crawling, but what about when you need wheel speed?.......SHIFT to second gear 3.5*4.3*4.88=73:1
I think most people forget that there are more gearing options in the tranny than just FIRST gear.


When you run granny low tranny's and 2F's then 1st and 2nd are usable pulling a loose or wet hill, but my 3rd is so high, even wiyh the the Atlas, I am relegated to 2 forward gears, 1 and 2.

i really like the new boxes comming out, i also prefer the doubler concept to just a low t-case. i like the idea of stock 2:72 lo or 4:1 low or both. in my case, FJ55 i would like to see a long adapter, on the front klune for excample they use a 1" plate, great for you FJ40 guys, but i sure would like a 6" plate, something in the neigborhood of a 12"-15" overall would be preferable for me. i guess i will have to contact these guys, marlin, klune and see if it would be possible to make a longer adapter.